Fix union header
Add method for initialisation of a ws_value_union from a value
Force enumeration value for invalid values to be 0
Add processor stack type and files
Add interface and stubs to ws_processor_stack
Implement initialisation and deinitialisation function
Implement method for pushint on the stack
Implement method for poping from the stack
Implement method for accessing top and bottom
Add concept of frames
Honor frame constrains when popping from the stack
Move files for command processor
Add members to processor context