* Update Documentation
Most work in Graylog and SNMP
Fixed many code tags, spelling and wording.
Added SNMP PowerShell example.
* Update SNMP-Configuration-Examples.md
Fix TOC brackets
* clean up all but header incrementing in Creating-Transport.md
* make Device-Dependencies.md mdl happy
* make Entities.md as mdl happy as possible... one long table line left
* make mdl as happy as possible for index.md
* clean up Introduction.md as much as possible
* minor formatting cleanup... move each icon onto its own row
* make ack and notes the same style
* clean Macros.md up
* clean Rules.md up as much as possible
* tweak one line a bit to get it to format a bit nicer
* a bit more format tweaking, making sure it does not sure with >
* clean up as much as possible for Templates.md
* make Testing.md as mdl happy as possibly
* clean Transports.md up as much as possible
* clean as many issues as possible for Alerts.md
* clean up as much of ARP.md as possible
* clean up as much as possible for Bills.md
* make DeviceGroups.md as mdl happy as possible
* cleanup Devices.md
* make as mdl happy as possible Inventory.md and index.md
* mdl cleanup for Logs.md and PortGroups.md
* make Ports.md and Routing.md as happy as possible
* clean up Services.md, Switching.md, and Systems.md as much as possible
* more markup cleanup
* lots more md cleanup udner Devloping/
* reapply bits from #10343 that accidentally got removed when merging
* docs: Continue to reorganize things
Make landing pages for /Installation, /API, etc.
Split API out into multiple docs
Properly use multi-level navigation
Add lower nav buttons (tops are bug so disable for now)
Add logo for fanciness
Refine index page a bit
* Improve API TOC layout
* Couple of fixes.
* Fix API/API-Docs, assumed it was at the right url.
