drop doxygen mainpage from liblbfgs (clashes with shogun mainpage)
drop doxygen mainpage from liblbfgs (clashes with shogun mainpage)

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