fixed eigen3 detection for the case where includes are located in non-standard directory, e.g. ./configure --includes=/home/user/include/eigen3/
fixed eigen3 detection for the case where includes are located in non-standard directory, e.g. ./configure --includes=/home/user/include/eigen3/

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