Consolidate functions in v4 spec.
change text-max-angle default and doc to degrees
add doc for base
ansis drink  more coffee
text-max-angle defaults to 45
Merge pull request #100 from mapbox/angleDegrees

change text-max-angle default and doc to degrees
Merge pull request #99 from mapbox/consolidate-functions

Consolidate functions in v4 spec.
offsets are not functions and not transitionable
remove set operators
Merge pull request #106 from mapbox/remove-set-operators

Remove set operators
remove filter_comparison to avoid infintely recursive filter specs
Merge pull request #107 from mapbox/remove-filter_comparison-from-filter_value

Remove filter_comparison to avoid infintely recursive filter specs
Merge branch 'master' into mb-pages
Add "function"=true to every option where "type"="color"
Merge pull request #109 from mapbox/colorfns

Add "function"=true to every option where "type"="color"
Merge branch 'master' into mb-pages
docs bump