Bug fix in TStoreImpl::GC and TOC comments.
listFile returns lexicographicaly ordered list of files.
bug fix: store.map did not return results.
Added save/load of integer vectors from file streams as JSON strings.
Added -DNDEBUG parameter to Makefile, fixed warnings of unused variables.
Merge pull request #34 from blazf/master

Bug fix on bug fix
Merge branch 'master' of github.com:qminer/qminer
added mustache and handlebars libraries