Fix loading pre-commit

Probably because of RVM or something, ruby -rrubygems -rpre-commit does not work
and does only the second. So this fixes the issue and loads pre-commit by eval.
Second attempt at adding :focus checks for rspec

This is much more thoroughly tested and probably a cleaner
branch to merge.
Fix HASHROCKET_PATTERN in ruby_symbol_hashrockets check
Add check to test
Merge pull request #58 from zzet/master

Fix hashrocket pattern
Update changelog.md
Merge pull request #57 from mikz/patch-1

Fix loading pre-commit
Update changelog.md
Revert "Merge pull request #57 from mikz/patch-1"

This reverts commit 703f9bfda09ac665ff29bc58c262a82c2d6e0125, reversing
changes made to bdffc69de83b12adfaff2e728633e51cd597648c.
Update changelog.md
Removing my info from .travis.yml
Adding git credentials so Travis stops blowing up.

Travis CI builds suddenly started failing. They are now requiring git
credentials for some reason. Not sure if they upgraded the version of
git they are using or what.

Anyway, now adding some git credentials to hopefully fix the build.
Remove debugging code with extraneous shell call
Gets all spec diffs in with one shell call

Also removes built gem accidentally added in the previous commit.
Merge pull request #60 from jamesbarnett/rspec-focus-check2

Rspec focus check2
Update changelog.md
Update changelog.md
Version bump to 0.8.0