updated configure script to work with ruby 1.8 & 1.9
updated configure script to work with ruby 1.8 & 1.9

sorig/shogun,karlnapf/shogun,besser82/shogun,lambday/shogun,shogun-toolbox/shogun,Saurabh7/shogun,Saurabh7/shogun,sorig/shogun,karlnapf/shogun,sorig/shogun,lisitsyn/shogun,shogun-toolbox/shogun,Saurabh7/shogun,Saurabh7/shogun,lambday/shogun,sorig/shogun,besser82/shogun,karlnapf/shogun,geektoni/shogun,Saurabh7/shogun,lambday/shogun,karlnapf/shogun,besser82/shogun,lambday/shogun,Saurabh7/shogun,geektoni/shogun,sorig/shogun,sorig/shogun,shogun-toolbox/shogun,lisitsyn/shogun,besser82/shogun,Saurabh7/shogun,besser82/shogun,shogun-toolbox/shogun,geektoni/shogun,geektoni/shogun,lisitsyn/shogun,lambday/shogun,geektoni/shogun,karlnapf/shogun,lisitsyn/shogun,shogun-toolbox/shogun,Saurabh7/shogun,karlnapf/shogun,geektoni/shogun,lambday/shogun,shogun-toolbox/shogun,Saurabh7/shogun,lisitsyn/shogun,lisitsyn/shogun,besser82/shogun