fix msvs 2010 linking - refs #260
no default args for template declaration
yet another try to please msvs 2010
fix typo
fix skipping of empty text nodes in rapidxml parser (matches libxml2) - closes #2253
travis: add matrix switch on XML parser
rapidxml: don't report the line number (its not meaningful)
Revert "rapidxml: don't report the line number (its not meaningful)"

This reverts commit f56121377ec6a9b4ecec8a6480be99eb5387d3a7.
don't report the line number unless its > 0 (its not meaningful)
return const& string from xml_node::get_text()

Conflicts:
	src/load_map.cpp
use math functions from std::
more tests for handling of empty Parameters
fixup xml_node::get_text() to avoid returning temporary
speed up xml map loading
support for GDAL >= 2.0 in ogr plugin - refs #2259
improvements to GDAL 2.x handling - refs #2259 amends cbdd112223b42576
update travis script
scons: support MAPNIK_NAME option to customize libmapnik name for custom packaging
fixup benchmark build flags
benchmark: also need -lrt on linux