Fix potential integer conversion problem
Tentative ruby version auto detection
Unlock base version
v0.2.3
Updated the auto discovery system
v0.2.5
Removed errinfo, which is not used anywhere and is buggy.
use RbConfig to find lib/includes
Merge pull request #3 from cstrahan/ruby-detection

use RbConfig to find lib/includes
Modified the automated ruby library finder

The version number is appended on my system, and the linker doesn't like
it.
Fix setup for ruby1.8
Add Centos include directory

See: https://github.com/bartavelle/hruby/pull/3#issuecomment-37424150
Set upperbound for scientific