Replaced msbuild with psake

Pester and Psake are installed automatically using nuget
now with chocolatey goodness!

Caution: may contain traces of DSC
Merge branch 'master' into psake

Conflicts:
	README.md
formalised package names and made module layout backward compatible
tasks to allow contributors to easily work on dsc resources
removed duplicate dependencies
don't blow away the target when removing a symlink/junction
exclude all files from the seek-dsk meta-package
uninstall all the things
re-enable package dependencies
removed a overzealous junction removal
build script overwrites the chocolatey version num

refactored scripts to splay arguments rather than passing strings
Merge pull request #16 from SEEK-Jobs/psake

Psake