Merge pull request #909 from gwaldo/death-to-wikidot

taking a stab at porting over the FAQ from wikidot
grafana colours

Allows same metric label colours as used in Grafana. Useful when changing graph generation in Grafana from flot to PNG
Merge pull request #912 from IainSR/patch-1

grafana colours
remove release date, still in development
Merge pull request #914 from obfuscurity/remove_release_date

Remove release date for 0.9.13 release notes
Providing optional step parameter for time(), sin() and randomWalk() functions.
Possible fix for issue #855
Merge pull request #916 from deniszh/master_step_parameter

Providing optional step parameter for time(), sin() and randomWalk() functions
remove graphlot and vendored libs
remove graphlot links
remove graphlot from setup
Merge pull request #918 from obfuscurity/retire_graphlot

Remove graphlot
use cairocffi instead of pycairo

As suggested by @brutasse and for #825
Merge pull request #919 from esc/use_cairocffi

use cairocffi instead of pycairo
remove unused icons and replace toolbar icons with a unified style
new icons converted from Font Awesome project
use alternate calendar icon
Merge pull request #922 from obfuscurity/new_toolbar_icons

Replace old composer toolbar icons