VS2013 fix
Merge pull request #806 from SunBlack/master

VS2013 fix
Typo in FindQVTK.cmake
Merge pull request #808 from fran6co/patch-7

Typo in FindQVTK.cmake
Fix grammatical non-sense
Merge pull request #809 from VictorLamoine/sandbox

Fix grammatical non-sense
Fixes #810.
Merge pull request #811 from mohawkjohn/vector_erase_end

Fixes undefined behavior from erasing an end iterator