Sync attempt with Bazqux.com

TODO : clean hard coded values, remove references to Google
Fix a loop
Modified the login check when refreshing all subscriptions
Set hostname as a variable
Solve a memory crash
FeedHQ complained about "ot" parameter not being an Unix timestamp.
Ignore the X-Reader-User response header

Bazqux sends dummy data, and FeedHQ sends nothing.
We don't need this info, anyway.
FeedHQ uses CSRF protection : requires referer
In fact, FeedHQ requires a token.
use POST method for credentials

As suggested by Bruno Renié from feedHQ.org, so that username/passwords do not appear in clear in the server's logs.
Unused variable
Separate auth item acquisition and token acquisition

- Seen from FeedHQ source : "auth" string and token don't have the same expiration schedule.
- Fixed a spelling typo.
Less verbose logs.
Stricter disconnection from Open Reader server
Make the "subscribe in Google Reader" option more consistent
Interface mockup for Open Reader settings.

Note : testing limited to English and French languages for the time being.
Add other locales (only partially translated)

Note to translators : Only very partially translated. To finish, look at :
- lines 67, 101, 200, 219, 783, 792, 816, 828 and 834 in SyncPreferences.xib
- entries with "Hint" keys in KnownSyncServers.plist
When you are at it, have a look at Localizable.strings… Many translations are outdated.
Disable fields when they are not relevant
Get rid of GTMOAth2 and GTMHTTP

Open Reader keeps it simple, using ClientLogin instead of OAuth. So, there wasn't real justification keeping these extraneous classes.
Added a few needed functions to our Keychain wrapper