correct return type from std::string::substr
integrate various minor c++ style and cast fixes into master from c++11 branch
optimize expression evaluation of text by avoiding extra copy
update changelog after 1dd1275
optimized WKTReader for parsing WKT into geometry paths
update changelog
viewer: leverage mapnik-config --cxx for QMAKE_CXX and QMAKE_LINK
improve the c++ and python demo apps to conditionally output image formats
fix webp images tests
be explicit about inlining feature.hpp methods
python: add support for __geo_interface__ - closes #2009
fix clipping test and drop rule cache tests
Fix whitespace
port box2d cleanups from c++11 branch to master
drop boost::interprocess::bufferstream and optimized wkb output
port minor fixes around type handling from c++11 branch
minor whitespace fixes
mapnik::value: avoid extra copy of value_unicode_string + define copy and assignment
c++ style
better type handling/casts