s/.net/.com/
Added missing fancybox overlay image.
Reduce volume of Travis build output

Hundreds of lines of build output passed through Travis JS parsing bring
my browser (at least) to its knees - little of it is interesting or even
relevant, keeping the last 40 lines of stdout for most make targets is
plenty (we keep all of stderr).
Avoid misleading messages about change id 0

Fixes bug 2618
Handle exceptions when there are no changes

If no edits recorded, catch DoesNotExist; treat as latest_change_id = 0
Make 0/None 'modified-since' logic explicit
Docs: Include Pootle-specific settings naming rule in styleguide
Cleanup: Rename USE_API to POOTLE_ENABLE_API
Require Jinja2 < 2.7 for Python 2.5

Jinja2 is a requirement of Sphinx (used to build documentation), but the
latest (2.7) version requires Python 2.6; allow build to succeed by
installing older 2.6 version before processing requirements
Propagate failure status through |tail

This restores proper failure detection broken in earlier commit titled
"Reduce volume of Travis build output"
Add note about Jinja2 and Python 2.5
Move release instructions into the docs/ dir
Add a release date
Fix date range for docs

Looked at wiki dates but also found the origianl 2004-12 release
announcement.  So lets just set 2004 as the start date.
Move release notes into the docs/
Add release notes for 2.5.0 final
Update releasable languages

Serbian, Arabic, Romainian, Ukranian, Danish, Dutch, English (South
African), Scots Gaelic, Slovenian
Update translations for unreleased languages
Fix lang=
Various update to release notes