Adding details to readme and updating order of presedence on config file path
Adding set variable functions in readme
Updating custom global config and mysection.raw config
Adding configuary setup to readme
Fixing typo and adding documentation to specify a different section name
Finishing merge section of readme
Adding .section to readme
Fixing typo
Fixing another typo
Updating merge readme on global config
Fixing yet another typo
Merge pull request #3 from oliverjohnstone/master

Adding usage to readme and updating order of precedence on write path.