INSTALL.txt -> INSTALL.rst. actual content still missing...
rewrote README
added exmaple to README
UG: updated project links to point to github instead of google code
UG: Changed characters used for underlining titles in source.

The motivation was to be able to start section specific files with
'====' underlining. This makes it easier to use installation section
both in UG and as INSTALL.rst. Changes have no effect to the generated
UG.
Updated UG's README and changed extension to .rst
removed non-standard install.py. closes #1753.
Removed supporting tools that have already been moved elsewhere.

See issue #1754 for details. Remaining task in the issue is updating
User Guide accordingly.
updated link to libdoc documentation