Multilanguagesupport (#3)

* Setting up the zelcash ui colors in the begin of the main class.

If a error happen in the beginning of load of the gui wallet, the error
message would appear with the java default colors.

* Putting all the messages/labels on the translation file.

* Putting all the messages/labels on the translation file.

* Putting all the messages/labels on the translation file.

* Putting all the messages/labels on the translation file.

* Add Copy, Cut & Paste functions to all textfields

* Added Copy (ctrl+c) function to selected table cell

* Putting all the messages/labels on the translation file.

* Added message sent/received color options to. Fixed some static colors.

* Add the possibility to skip creating messaging identity.

* Putting all the messages/labels on the translation file.

* Added a blue theme option and cleaned the code

* Added 4 new themes

Bluest Theme
Earth Green Theme
Red Theme
Moon Theme

* Added a new theme (sun) and made some small changes on others.