Added Rails 4 mapper for Minitest.
Merge pull request #17 from zw963/master

Added Rails 4 mapper for Minitest.
Merge pull request #18 from eightbitraptor/master

A Project root can be defined by the presence of a test directory
Add autoload cookies for lazy loading
Merge pull request #19 from syohex/autoload-cookie

Add autoload cookies for lazy loading
Fix some byte-compile issue

- declare local variable
- use with-current-buffer instead of save-excursion + set-buffer
- remove unused variable
- use goto-char + forward-line instead of goto-line
Merge pull request #20 from syohex/fix-byte-compile-issue

Fix some byte-compile issue