base64 module

[damies13]

• encoder
• decoder
• robot encoder
• robot decoder

[damies13]

still need to figure out how to put the encoder's and decoder's into the robot scripts at the right times

[damies13]

Merged first part into v0.2.0 as I still need to split variables by delimiters first before the decoder can work properly with the sample b64 string from the Tryton site