Major refactoring:
- version 2.0.0rc1
- preparing for new features, with configuration etc
- separated inputs into separate files (snoopy_input*)
- reparated logging facilities into separate file (snoopy_log.*)
- storing filename and argv/envp (TODO) in global variables, so they can be consumed by inputs if requred
- only execv()/execve() wrappers still in snoopy.c
- added snoopy-test-output program
- fixed makefile to support -jX