Prepare the 1.3.0dev2 release.

[mateor]

Having a python dependency error - looking locally but wanted to async let Travis have a go, since it was green for the last commit

23:09:38 00:08           [eval]

                         Failed to eval tests/python/pants_test/cache:cache_server
Failed to eval 'file tests/python/pants_test/cache/cache_server.py':
  File "[srcroot]/pants_test/cache/cache_server.py", line 16, in <module>
    from pants.util.contextutil import pushd, temporary_dir
  File "/Users/mateo/dev/pants/src/python/pants/util/contextutil.py", line 18, in <module>
    from colors import green
No module named colors

colors.py is indeed in the site-packages, though.

[mateor]

As noted on the now-defunct RB:
"Fix some whitespace.

The dry-run of the release was green locally. Travis revealed some whitespace errors in the master.rst, which are fixed here.
./pants markdown --fragment src/python/pants/notes:: failed before this change and now passes.
"

[stuhood]

Thanks!