First alpha version

This pre-release contains the first "working" version:

• .threshfile with projects & limited options
• Piped stdout/stderr to job logfile (ie. tail -f can be used while the job is running)
• Naive matching of branch names (no patterns)
• Only one project/job per repository
• No opt-out of logs endpoints (/logs & /logs/:{job_id})
• /logs endpoint contains .log the job ids
• No streaming of logs to /logs/:{job_id}
• No job metadata (eg. time when run, project, exit status, etc)
• No security features (ie. no check on webhook secrets)