Support for NDK r9 on 64 bit platforms

Credit goes to David Faure.
Add a possibility to select a toolchain
Add a support for Boost-1.54.0
Merge pull request #47 from jauhien/boost-1.54

Add a support for Boost-1.54.0
Update README.md
Merge branch 'devel'
Fixes undefined reference from boost::filesystem

To std::locale.