Merge pull request #1 from fsuter/master

[BUGIFX] Corrected styles for nested lists
[FEATURE] Add CSS for highlighting in t3pygments.css
[TASK] Add documentation about CSS
[Task] Add chapter about 't3pygments.css'
[TASK] Rework 't3pygments.css'
[FEATURE] Add script check_include_files.py
[TASK] Improve check of included files (v0.2.0)
[BUGFIX] Set exitcode=3 for illegal include files
Save the changes Xavier made. More info to cron stdout (for email).

Remove regression:
look for $GITDIR/README.rst, not $T3DOCDIR/README.rst
Send info to stdout only when REBUILD_REQUESTED
[FEATURE] Add PDF rendering step
[BUGFIX] pdflatex should never wait for user input

In case of failure while compiling the PDF, pdflatex waits for
user input. Change mode of operation to run and halt if anything
unusual appears.
[TASK] Include version (and language) in PDF name
[TASK] Prefix PDF with "manual."
[FEATURE] Lazy recreate files

Share files between html and singlehtml output.
[BUGFIX] Invalid extraction of version
[FEATURE] Deduplicate files
[CLEANUP] Use fdupes solely
[FEATURE] Do not compile PDF/zip for OpenOffice-based manuals

When generating cron_rebuild.conf, constant PACKAGE_ZIP shoud be
set to 1 only if the project in natively using ReStructuredText.
Minimal pattern for version folder is now "num.num" like "1.0"