Comfortable month and year change

Thanks to @snake-345 #367

Calculate left offset in respect of window limits

Thanks to @fede91it
#354

Added Bulgarian translation

Thanks to @Stromwerk

Fix for Japanese weekdays

Thanks to @Rittyan !

Fix for Finnish translation

Thanks @eljass

Added Finnish translation

Thanks to @eljass

Backward compatibility with jQuery 1.3.2

thanks to @dtaipov !

Since it is backwards compatible, this might have been 0.13.1 but due to lack of testing a bump of the minor version seems appropriate...

Added some Russian translations and fixed some others

Thanks to @dtaipov

Support for custom symbols on previous / next buttons

thanks to @mazipan

Support for Indonesian

thanks to @mazipan