fixed pointer arithmetic in nnbf
added erics simple loop optimiztions
added a nearest neighbor cython search example
Merged 6754, 6761 from v0_98_5_maint
Fix validation error in matplotlib.use()
Upgrade CXX to 5.4.2
possible fix for gcc 4.3 (Ubuntu 8.1)
fix typo
Fix bug introduced in 6755 and modified in 6756--problem using svnmerge?
Fixed a typo, an elif was placed after the else part of an 'if' statement.
