pgmapcss_compile(): Bugfix
load.sh: A script to load all sql functions to the database
load.sh: Load test stylesheet
Bugfix: drop type _if exists_
pgmapcss_install(): call this function to actually create pgmapcss functions + testdata
Compile: use stat object to store general data
Handle ::layer selector (return several styles)
Order results by 'object-z-index'
Remove mockup code
Add Documentation of MapCSS dialect
Add real-world data test
Add chapter about eval expressions
Support assignments
Support classes
Add a test mapnik stylesheet to demonstrate pgmapcss
README: description check function, example usage
README: Add compatibility information