pgmapcss_compile_statement(): rename from _build_statement(); improve comments
pgmapcss_compile_statement(): remember all possible property values
pgmapcss_compile: {style_id}_stat() returns all collected data
preprocess_colors: read possible values for colors from database
preprocess_colors: replace values as specified in 'FOR'
preprocess_colors: add warning about eval-generated properties
preprocess.pl: rename from preprocess_colors.pl
preprocess: ignore empty property value
pgmapcss_parse_properties/preprocess: differenciate between empty value and ""
Test Style: add more Symbolizer parameters and default values
MapCSS: add "::(xxx)" pseudo element (don't create pseudo element from this rule)
MapCSS: pseudo element '*' <- all pseudo elements
load.sh: compile stderr and stdout together, 'less' result
Eval::sqrt(): bugfix
Eval::any(): make sure that any() returns something (at least '')
Set default values for all pseudo elements
test.mapcss: draw buffer around all places, with size depending on population
Create default.mapcss and default-template.mapnik