docs: richer documentation

[tiborsimko]

• Enriches documentation by the information taken from wiki pages. Useful for future plugging into Read The Docs. (addresses #13)
• Note: the information is taken rather literally so far, modulo formatting changes. An update of the documentation content, reflecting the recent code base changes is still to come.

Signed-off-by: Tibor Simko tibor.simko@cern.ch

[tiborsimko]

This PR takes all wiki pages and integrates them in the docs. The current table of contents looks like below. There is a potential for reorganising to streamline the docs, but that's for another PR.

P.S. It would be good to create http://timegate.readthedocs.io/ for easy reading of docs, as well as to enable the Read The Docs service integration hook on GitHub.

---