Improve ruby `desc` snippet

Instead of dummy text, first argument for `describe` becomes a class
name derived from a file name. Example:
file:              some_class_spec.rb
describe argument: SomeClass
Merge pull request #279 from bsutic/improve-ruby-desc

Improve ruby `desc` snippet
Improve processing snippets
Merge pull request #280 from crazymaster/master

Improve processing snippets
Fix a wrong snippet in processing
Merge pull request #281 from crazymaster/master

Fix a wrong(duplicate) snippet in processing
[php] [symfony] some bugfix and improve

symfony snippet `ent` now support abstract class