Attempt to fix travis-ci build (Grit needs the master branch present)

Add: * Comments in the .travis.yml explaining some of the before_scripts * Additional before_scripts for acquiring the master branch

Author: kevinjalbert

.travis.yml

@@ -9,6 +9,14 @@ bundler_args: --without test darwin
 notifications:
  email: false
 
-before_script: git pull -q --depth=1000000
+before_script:
+ # Tests are ran against the repos early history
+ - git pull -q --depth=1000000
+
+ # Grit's Commit.find_all(...) requires the master branch to be present
+ - git remote add master git://github.com/kevinjalbert/git_statistics.git
+ - git fetch master
+ - git checkout master
+ - git checkout -
 
 script: bundle exec rspec spec