Add value names
Add LEN() macro for getting array length
Add implementation of ws_value_type_from_value_name()
Merge pull request #237 from matthiasbeyer/add-value_name_table

Add value name table
Add note introducing implicit argument list
Merge pull request #238 from neithernut/add-coammand-implicit_arglist

Add note introducing implicit argument list
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 pushing 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
Add convenience method for getting a value at a position
Move files for command processor
Extend processor interface and use new name for processor