rewrite 'help cmdname' text slightly

- fixes a grammatical error
- remove a trailing whitespace
- quotes the provided command in the result
- make consistent response text across 'found' / 'notfound' cases
- indent actual commands in response by 2 characters to distinguish the list from pages/etc
All tests now passing
Making regex search case insensitive. Issue #26
Updated monitor_current_oncall to be more explicit with defining an error from mklivestatus. Issue #25
Merge pull request #27 from floatingatoll/patch-2

rewrite 'help cmdname' text slightly
Refactored downtime to call new process_downtime function. Issue #31