CLI enhancements

[shaunakpp]

• Thor Cli added
• Supports the generate command
• Option to overwrite directories added. Solves #21.
• allow auto-generation of Makefile
• allow an auto-compile option to create shared object files
• specs for cli

[v0dro]

Nice. Looking forward to the whole thing!

[v0dro]

Sorry for the late merge. I've been very busy lately. Will be starting development again now. Thanks for the CLI!