Fixing broken links & reformating git.o to github
Fixing redirected links
Install textlive and add latexpdf to the command of the Travis build
Replace OMERO_HOME environment variable by OMERO_PREFIX
Replace OMERO_HOME by OMERO_SOURCE_PREFIX when pointing at source code
Add warning about setting the OMERO_HOME environment variable
Improve readability of paragraphs referring to OMERO_PREFIX
Restore usage of OMERO_HOME variable in OMERO.grid page
Expand exported variable and removed unclear paragraph
Merge pull request #318 from hflynn/rebased/develop/formats2

Fixing Formats links (rebased onto develop)
Explicitly disallow Python 3 and Ice 3.5 in stable docs

With the new release of Ice 3.5 we need to make it immediately
clear that Ice 3.5 is not (yet) supported. Similarly, Python 3
is not an option, whether with or without Django involved.

See forum thread:

 * https://www.openmicroscopy.org/community/viewtopic.php?f=5&t=4788&p=9654#p9654
Move OMERO documentation to omero/ subfolder
Fix compilation by pointing at the themes/ directory
Remove formats from excluded patterns in OMERO documentation
Move shared configuration settings to common configuration file

- Common configuration moved to common/conf.py
- Move themes to common/
Add central Makefile to build OMERO & Formats documentations at once

Also allows Travis script command to remain unchanged
Move additional FSlite file to the new structure
Explicitly disallow Python 3 and Ice 3.5 in stable docs

With the new release of Ice 3.5 we need to make it immediately
clear that Ice 3.5 is not (yet) supported. Similarly, Python 3
is not an option, whether with or without Django involved.

See forum thread:

 * https://www.openmicroscopy.org/community/viewtopic.php?f=5&t=4788&p=9654#p9654
merge develop -D org -I include -E exclude: PR 319 (Add latexpdf to the Travis build (rebased onto develop))
merge develop -D org -I include -E exclude: PR 320 (Do not expose OMERO_HOME in the doc (see #10603) (rebased onto develop))