improve compatability with WP 3.6
refactoring diff.php to use mergely.js. adding mergely code to js/ (sans its examples and docs; just the source)
start of three-way diff for mergely
compare/diff functionality, resolve failing tests
Lowercases capital 'H' in 'When' in inline documentation for delete_post() because grammar.
Merge pull request #63 from yurivictor/master

Grammars
fixing diff.php
Merge branch 'dev-3.6'