Fixed compilation errors on gcc
Merge pull request #211 from peastman/master

Fixed compilation errors on gcc
Tabulated log(x) to improve GB performance
Merge pull request #212 from peastman/master

Tabulated log(x) to improve GB performance
Fixed compilation errors on OS X 10.9
Merge pull request #213 from peastman/master

Fixed compilation errors on OS X 10.9
Added some missing virtual destructors
Merge pull request #215 from peastman/master

Added some missing virtual destructors
Fixed errors on OS X 10.9: link against libc++ instead of libstdc++
Merge pull request #218 from peastman/master

Fixed errors on OS X 10.9: link against libc++ instead of libstdc++