Improve help strings

Follow oslo.config style guide for help strings better to create
consistent help strings:
* Capitalize first word of each help string
* Finish help strings with "."

Change-Id: Iac0a0fc0ea6c0cf23f2523fe6030a842810b6909
Switch over to oslosphinx

oslosphinx is the new name of oslo.sphinx

Closes-Bug: #1277168
Change-Id: I8aa08e3e16d46209b9aeb20a70b3984b2a4ae5bb
Merge "Switch over to oslosphinx"
Merge "Improve help strings"