Move technical docs to docs/technical, and put non-technical stuff in docs/

Also updated the README file in this dir and moved the rel notes archive

Change-Id: I82e0b61c5c666f2dc046e2b44ffe099d9e59aed6
Update INSTALL

Change-Id: If5114ef08df8f3be750b6d5506100313c82c116e
Update version table

Change-Id: Ib6a4b859aa7567c17050029191252296ed6e77d0
Update version table

Change-Id: I034622005c6aa42722627d3d97aa2dfbc5b89b74
Update manual install section

Change-Id: Ic3b597b725c0c7e140f80c15abb695d3ed6f268f
Merge pull request #26 from JeroenDeDauw/docmove

Update documentation bundled with SMW