Made CLinearOperator generic
Fixed whitespaces and Documentation
Added multilabel reader in LibSVMFile.
Added multilabel writer in LibSVMFile. Updated LibSVMFile unit test.
Corrected indent issues and memory leak.
Merge pull request #2093 from sunil1337/Linear_operator

Made CLinearOperator generic
Merge pull request #1964 from ahcorde/develop

Eigenfaces example
Merge pull request #2073 from Jiaolong/io_multilabel

Added multilabel reader in LibSVMFile - thanks to Jiaolong