Tidy up library packaging process as that which befits a header-only library

[saxbophone]

• There's no need to build a binary object for the library currently, neither is there a need to do release builds on mutliple OSes (unless we want to start using CPack to generate specific installers for each platform)
• User-friendly installers using CPack would be really nice
• Verify usability of library from client projects using a CMake build system
• Consider feasibility of pre-compiling template instantiations and bundling these into binary version of the library