Merge branch 'release-beta-1.0' into issue_476_alerts

Conflicts:
	requirements.txt
	templates/member/base_read.html
	templates/source.html
	zds/forum/views.py
	zds/tutorial/views.py
	zds/utils/models.py
Finally MP alerts won't be implemented (or not this way)
Merge pull request #507 from Taluu/issue_476_alerts

Issue #476 alerts
Tons of whitespace-only modifications --> NL problems
Fix #490 - Redirection vers l'image apres ajout
Rename forum-message in topic-message
Merge remote-tracking branch 'origin/release-beta-1.0' into alerts_groups

Conflicts:
	requirements.txt
	templates/forum/post.part.html
	templates/member/base_read.html
	templates/member/profile.html
	templates/search/search.html
	templates/source.html (to be re-checked by @firm1)
	zds/forum/views.py
	zds/member/forms.py
	zds/member/models.py
	zds/member/views.py
	zds/mp/views.py
	zds/tutorial/views.py
	zds/utils/models.py
Design and integration of MPs
Add keyboard navigation with j/k keys
Fix small thing in forum template
synchronise gallery and tuto when you quit
auto unfollow when topic is moved
Update requirements.txt

Fix issue #510 ( [#17 in zmarkdown](https://github.com/zestedesavoir/Python-ZMarkdown/issues/17) )
improve display
Merge pull request #511 from Taluu/fix_markdown_auto_rl

fix markdown auto url
Merge pull request #512 from Taluu/release-for-tuto

Many corrections
fix merge errors
Merge pull request #504 from Taluu/alerts_groups

add alerts for tutos an articles invalidations
Update requirements.txt
Merge pull request #513 from Taluu/fix_markdown

fix markdown auto url