Fixed the sample32
added new specs for methods ruby SDK and fixed bugs in the methods
modified the methods in SDK
fixed bugs in samples 1-21 and add signature to url for request
fixed bugs in SDK
fixed bugs in samples 19-33
fixed bug in class Envelope
create new methods
add new sample34 and fix sample5
fix bugs in method get_documents_filds
updated sdk
add new samples 35
add documentations sample35
fixed bugs in sample35
Merge branch 'samples-dev'