Update TVB Installation document, for build machines and hard-code contributors.

The majority of contributors won't need this, nor the temporar developers, as they can work with TVB-pre-build packages.
When adding a new dependency in TVB, this is needed.

Alfresco document with install procedure.
EPD alternative should be mentioned.
Gather info from: Jira, Alfresco (with remove old docs), svn/docs/install_debian.sh (svn doc should disappear after this as well).