aspcud version 1.9.6

• update catch

aspcud version 1.9.5

• compatibility with boost >=1.74
• update catch

aspcud version 1.9.4

• refactor aspcud application to c++ to ease maintanance
• sanitize aspcud options
• header only dependency to boost

aspcud version 1.9.3

• switch to MIT license
• switch to boost program options
• update cmake files to require version 3.1
• lemon and re2c files can be pre-generated now
• move to github