Move code-comments into --help output in updater
Make updater more portable

* Abstract start/stop server commands, make configurable

* Abstract wsgi file path, make configurable

* Small --help readability tweaks
Clarify explanation of new config-opts
Merge branch 'master' of https://github.com/servermon/servermon into improve-update-script
Merge pull request #43 from rowanthorpe/improve-update-script

Move code-comments into --help output in updater (and improve configurability)