TODO: should be factorized

For future Python 3 compatibility.

related to e93d724e

When installing weboob in $HOME, the weboob base modules (weboob.browser...)
are installed in $HOME/.local/lib/python2.7/site-packages/... (see PEP-370).
When running weboob from the source directory with tools/local_run.sh, those
base modules are read from $HOME/.local instead of the source directory.
Passing the "-s" option to python makes it ignore $HOME/.local and read the
base modules from the source directory.

Signed-off-by: Matthieu Weber <mweber+weboob@free.fr>

The user may now use conditions on durations (from the audio and the video
capabilities) in repl applications.

The documentation has been updated to take this change into account.

For system installation, the bash auto-completion will display messages
for users without home directory. Redirect stderr to null

"sort" is confusing, we filter results, not order them. "sort out" would
also work.

autopep8 -a -r -i --select E711,E712,W601,W602,W603,W604,W690,E304,E401,E502 .
Also includes some manual reindentations (many are left after the print()
changes).
Manually checked, some modernizations not commited here.

Use stream.isatty() instead.

weboob.tools.browser -> weboob.deprecated.browser
weboob.tools.parsers -> weboob.deprecated.browser.parsers
weboob.tools.mech -> weboob.deprecated.mech
weboob.browser2 -> weboob.browser
weboob.core.exceptions -> weboob.exceptions

Also, the new tree for browser2 is:

weboob.browser: import weboob.browser.browsers.* and weboob.browser.url.*
weboob.browser.browsers: all browsers (including PagesBrowser and LoginBrowser)
weboob.browser.url: the URL class
weboob.browser.profiles: all Profile classes
weboob.browser.sessions: WeboobSession and FuturesSession
weboob.browser.cookies: that's a cookies thing
weboob.browser.pages: all Page and derivated classes, and Form class
weboob.browser.exceptions: specific browser exceptions
weboob.browser.elements: AbstractElement classes, and 'method' decorator
weboob.browser.filters.*: all filters

python modernize.py --no-six -f libmodernize.fixes.fix_print -w

With manual fixes as the import was put always on top.

This way run_tests.sh follows what local_run.sh can do.

So people don't waste time altering them, but alter the source instead.

close #1403

close #1404