Ignore files related to Cocoapods.

These include Podfile, Podfile.lock, and Pods/.
Custom File.extname method which returns the filename if it is an extension
Remove .rb test
Sample files to test the new FileBlob.extension method
Merge conflicts from master fixed
Remove stylistic yet useless parentheses
Rename file for the test on non-existing extension
Only ignore Pods/ for CocoaPods.
Ignore everything in the Pods directory.
Merge pull request #1352 from github/assembly-inc-revert

Reverting https://github.com/github/linguist/pull/1268
Testing Pods
Merge pull request #1353 from github/1217-local

1217 local
Ask Charlock earlier
Update vendor.yml: normalize.css

Added popular CSS reset Normalize.css (http://necolas.github.io/normalize.css/)
Removing second binary? check
Adding test for Normalize.css
Merge pull request #1360 from github/1358-local

1358 local
Merge pull request #1354 from github/binary-language-mkII

Ask Charlock earlier
3.0.3 release
Merge pull request #1361 from github/release-3.0.3

3.0.3 release