Add build and tools

Hi,

This is some stuff around build:
- add local build & tools (including nuget,doc,zip)
- created nuspec
- integrate build scripts to build, test, create doc and create nuget package
- updated backlog

benefits:
- easier local tasks
- prepare for CI (setup later with team city to build.codedistillers.com if you want)

Note: as said in backlog, you should setup tasks as github issues

cheers!