use c++11 in vertex_converters (work-in-progress)
revert template instantiation depth to 300
fix cpp_test
re-implement vertex_converters using c++11 feature (removes dependency on boost::mpl/boost::fusion)
cleanup
update cairo and grid renderers to use new vertex_converters
Merge branch 'master' into vertex-converter
Merge branch 'vertex-converter'
make arguments noncopyable
remove unused mpl header
move dasharray parser to cpp file - refs #2439
add missing file
remove unused //#include <mapnik/expression_node.hpp>
make index constexpr
improve visual test - more data bound properties
add visual test - text data binding