fix duplicated source adding
update wagn version
fix describe wrong thing in rspec
Merge pull request #85 from chuenlok/source_preview_optimization

fixed iframable is not working on ruby<2.0
speed up contribution count
fixed contribution count
Merge pull request #86 from xithan/master

speed up contribution count
Merge pull request #82 from chuenlok/duplicate_sources

fix duplicated sources adding
fix error while adding normal source
Merge pull request #87 from chuenlok/duplicate_sources

fix error while adding normal source
allow a few more type to be shown in browser, enable pdf showing in ff
Merge remote-tracking branch 'wagn/master'

Conflicts:
	mod/wikirate/set/self/wikirate_source_preview_page.rb
check request is nil or not
support ruby <2.0
Merge pull request #88 from chuenlok/master

allow a few more type to be shown in browser, enable pdf showing in ff
further contributions improvements
Merge pull request #89 from xithan/master

further contributions improvements
Merge branch 'master' into rspec

Conflicts:
	mod/wikirate/spec/mod/wikirate/set/type/webpage_spec.rb