Adding 2.1.4 as latest RethinkDB

Per @stuartpb's README instructions

library/rethinkdb

@@ -1,25 +1,26 @@
 # maintainer: Stuart P. Bentley <[email protected]> (@stuartpb)
 
-1.15.1: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.15.1
-1.15.2: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.15.2
-1.15.3: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.15.3
-1.15: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.15.3
-1.16.0: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.16.0
-1.16.1: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.16.1
-1.16.2: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.16.2
-1.16.3: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.16.3
-1.16: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.16.3
-1: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/1.16.3
-2.0.0: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.0.0
-2.0.1: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.0.1
-2.0.2: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.0.2
-2.0.3: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.0.3
-2.0.4: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.0.4
-2.0: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.0.4
-2.1.0: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.1.0
-2.1.1: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.1.1
-2.1.2: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.1.2
-2.1.3: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.1.3
-2.1: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.1.3
-2: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.1.3
-latest: git://github.com/stuartpb/rethinkdb-dockerfiles@e676e24872e8244a9d75930bf441ebd40588369c jessie/2.1.3
+1.15.1: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.15.1
+1.15.2: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.15.2
+1.15.3: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.15.3
+1.15: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.15.3
+1.16.0: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.16.0
+1.16.1: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.16.1
+1.16.2: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.16.2
+1.16.3: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.16.3
+1.16: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.16.3
+1: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/1.16.3
+2.0.0: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.0.0
+2.0.1: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.0.1
+2.0.2: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.0.2
+2.0.3: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.0.3
+2.0.4: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.0.4
+2.0: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.0.4
+2.1.0: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.0
+2.1.1: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.1
+2.1.2: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.2
+2.1.3: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.3
+2.1.4: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.4
+2.1: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.3
+2: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.3
+latest: git://github.com/stuartpb/rethinkdb-dockerfiles@585843db25b1a40cc546112771171f818f6cd951 jessie/2.1.4