Two factor authentication plugin using YubiKey

With this plugin you can use a YubiKey hardware token device (available from Yubico.com) for two-factor authentication in Joomla!. The OTP validation is performed against the YubiCloud servers.
SQL files for the YubiKey two factor auth plugin
Changed description of plg_twofactorauth_yubikey for greater clarity
Merge branch 'refs/heads/projects-master' into feature-twofactor-yubikey
Merge branch 'refs/heads/projects-master' into feature-twofactor-yubikey

Conflicts:
	administrator/components/com_admin/sql/updates/mysql/3.2.0.sql
	administrator/components/com_admin/sql/updates/postgresql/3.2.0.sql
Improved YubiKey handling

- Error message shown when you try to activate this feature but the OTP is invalid or doesn't validate against YubiCloud's servers
- Shuffle the list of YubiCloud servers, using a different, random one every time (helps spread out the load and improve the resilience of the implementation)
- Use a time based nonce instead of the form token to prevent YubiCloud responding with REPLAYED_OTP if the form token doesn't change between subsequent attempts
Update assets on upgrate
The YubiKey authentication would always return false
CS update
Merge pull request #96 from dbhurley/assetupdate

CS update
TinyMCE updated to version 4.0.8
Version in XML updated
Fix fof form field non existing property set.
Removing default (string) type conversion of value in __set.
Fixing setting of nonexistent properties in a field class.
Making JLog message more helpfull for debugging.
Merge pull request #2270 from Achal-Aggarwal/formfield-set-nonexistent-property

Formfield set nonexistent property issue.
Update CHANGELOG
# [#32344] *Overrides bug: Warning: constant() [function.constant]:
Couldn't find constant JPATH_0
(Fix #2279)
[32344] same in public function delete($cids)