Update catalan translation in current trunk
Merge pull request #205 from aseques/update_catalan

Update catalan translation in current trunk
add .svn to .gitignore
Add the option to enable the logo in the main configuration
Use default_logo.png in login pages
Merge pull request #206 from aseques/enable_logo

Add option in the main configuration to enable a logo for playsms
add lib/fn_shortcuts.php, holds shortcuts
add _log() shortcut to logger_print()
cleanup main_config
add logo url to main_config
add option to get logo replacing website title, cleanups
add css class playsms-logo
comment logger_print on billing_getdata_by_uid(), too verbose
fix auth_block()
links on header location also use _u()
_back() _button() and _a() to implement _u()
simplify plugin page loading in inc/app/main.php
more and more to use defines
cleanup main.php
cleanup init.php