Plugin support / Usability improvements

Plugin support

• Add support for extension plugins
  • see Plugin development repo

Usability improvements

• Use Android standard functionality for data functions

Translation updates

• Update Russian ( Thanks to @DmitriySM1 )
• Update Portugese ( Thanks to @mansil )
• Update Potugese (Brazil) ( Thanks to @hcarnetta )
• Update Japanese ( Thanks to @naofum )
• Update Hebrew ( Thaks to @yarons )
• Update Italian ( Thanks to lesto )
• Update French ( Thanks to @emeric254 )
• Update Ukrainian ( Thanks to Марс Ямбар )
• Update Swedish ( Thanks to @sebras )