Update category topics_count when update topic, fix #15
Allow select blank category when edit topic
rescue elasticsearch exception and add logger
use visitor to replace nokogiri css selector
use includes to resolve N+1 query issue
Add .travis.yml
Fix sed username in .travis.yml
Fix .travis.yml
import elasticsearch index before travis build
Create search index in test helper
Merge pull request #17 from quake/upstream

rescue elasticsearch exception and add logger
travis bundler without development
Remove unused travis config
Merge pull request #19 from quake/feature/resolve_n_plus_1

use includes to resolve N+1 query issue
Use includes avoid N+1 query
Fix username format validation
Same username format in mention extract
Merge branch 'feature/nokogiri_visitor' of https://github.com/quake/campo into quake-feature/nokogiri_visitor

Conflicts:
	app/helpers/markdown_helper.rb
Combine link mention and link comment helper
Add travis-ci status image in README.md