Add info on memory requirements.
use c++11 in vertex_converters (work-in-progress)
Merge pull request #2444 from joto/patch-1

Add info on memory requirements.
improve visual test - show line direction
Merge pull request #2445 from mapycz/improve-test-text-displacement

improve visual test - show line direction
add visual test text vertical-alignment
Merge pull request #2449 from mapycz/test-valign

add visual test text vertical-alignment
simplify text rendering benchmark to only render text + be explicit about clipping - refs #2326
fix windows compile - apparently numeric_limits is not viably constexpr - closes #2452
3.x port of localized font caching and then some
fix benchmark compile
c++ style
unique_ptr for font_face_set
ignore font cache in map assignment and comparison
cleanup
add code comments to create_face
simplify code in create_face
revert template instantiation depth to 300
fix cpp_test
re-implement vertex_converters using c++11 feature (removes dependency on boost::mpl/boost::fusion)