Prevent user from posting multiple times

Disabling the navigation bar buttons when there is a post (new idea/comment) in progress so the user won't post the same content multiple times.
Besides posting multiple times, this was causing a crash on the app when the additional requests responses returned.
Importing Yahoo! provided translations
Merge remote-tracking branch 'rafaelbaggio/master' into yahoo
Merge remote-tracking branch 'origin/master' into yahoo

Conflicts:
	Resources/pt.lproj/UserVoice.strings
Disabling only submit button

Keep cancel button enabled while a request is in progress.
Keep submit button disabled during the whole posting process (auth + post)
Refactoring on request delegates

Passing UVCallback objects instead of the requesting view controller as delegates for the requests
[bug 6441412] Only show network error alert once

And unset the alert view delegate on dealloc
Always init suggestion details VC with suggestion

Register callbacks even if initialized without suggestion.
Merge branch 'master' of https://github.com/uservoice/uservoice-ios-sdk into rafaelbaggio-master
Merge branch 'refs/heads/bug6230408' into rafaelbaggio-master

Conflicts:
	Classes/UVBaseViewController.m
Merge remote-tracking branch 'origin/bug6441412' into rafaelbaggio-master
Merge branch 'master' of git://github.com/rafaelbaggio/uservoice-ios-sdk into rafaelbaggio-master
Add back some methods that got lost