Update tagline to match website

Signed-off-by: Ben Firshman <[email protected]>

fig/cli/main.py

@@ -68,7 +68,7 @@ def parse_doc_section(name, source):
 
 
 class TopLevelCommand(Command):
-    """Punctual, lightweight development environments using Docker.
+    """Fast, isolated development environments using Docker.
 
     Usage:
       fig [options] [COMMAND] [ARGS...]

setup.py

@@ -49,7 +49,7 @@ if sys.version_info < (2, 7):
 setup(
     name='fig',
     version=find_version("fig", "__init__.py"),
-    description='Punctual, lightweight development environments using Docker',
+    description='Fast, isolated development environments using Docker',
     url='http://www.fig.sh/',
     author='Docker, Inc.',
     license='Apache License 2.0',