Make sure that non-px values aren't manipulated before input to height/width.
-rw-r--r-- 13 .gitattributes
-rw-r--r-- 89 .gitignore
-rw-r--r-- 15099 GPL-LICENSE.txt
-rw-r--r-- 1074 MIT-LICENSE.txt
-rw-r--r-- 2132 Makefile
-rw-r--r-- 2953 README.md
-rw-r--r-- 3631 Rakefile
-rw-r--r-- 4813 build.xml
drwxr-xr-x - build
drwxr-xr-x - speed
drwxr-xr-x - src
drwxr-xr-x - test
-rw-r--r-- 8 version.txt