Added search wiki feature
Created by: coverer
As a lot of people requested, I implemented the search in wiki pages.(again), hope this time I followed the style guid and contributing guidlines... Refers to: http://feedback.gitlab.com/forums/176466-general/suggestions/4078088-add-wiki-search-function
Comments: Since the structure of gitlab has massively improved since the last time, it was now much easier to implement the search feature. I simply added a new filter to project_filter called Wiki which calls the search engine with a new scope 'wiki_blobs'. This is evaluated in ProjectSearchResults, where a new method works straight on the ProjectWiki repository to search files.
New UI:
Affected files: app/controllers/search_controller.rb app/views/search/_project_filter.html.haml lib/gitlab/project_search_results.rb New file: app/views/search/results/_wiki_blob.html.haml