Reload functions: drop functions 'if exists'
Merge branch 'branch-0.2'
README: Remove example from readme; point to examples/ instead
README: fix formatting
CHANGELOG: update for 0.2.0
Eval::number(): be more flexible for input values
Examples README: fix markup
MapCSS: Support 'image', 'icon-image', 'fill-image'
Object id is available as tag 'osm_id'