Lock-file Management

• locker.py - Locker is a Python class that provides lock-file tools for your Python applications. This was based on Gekitsuu's Mutex() and has expanded over the years to meet my various devops/sysadmin needs.
• locker.sh - A POSIX-compliant command line tool to manage lock files for shell scripts.

Examples and documentation are included in each file.

To Do / To Discuss:

1. Locker.check(): If the contents of self.file cannot be converted to an integer should we overwrite?
2. Locker.*: Remove exception trapping.