Removed 2.2 references as it reached eom
links in documentation overview contributing moved to bottom
Fixed namespace in Handling Form Submissions standalone example.
some tweaks for #3190
Merge pull request #3238 from peterkokot/patch-2

Links in documentation overview contributing moved to bottom
Merge pull request #3239 from zsjavorszky/fix_form_handling_example

Fixed namespace in Handling Form Submissions standalone example.
fix two little syntax errors
[Cookbook][Configuration] Fix front controller sample code
[Cookbook][Console] Fix statement
[Cookbook][Assetic] Update JS minifier recommendation
Improve ISO code references
fixed markup
Update language field/constraint
[Cookbook][Forms] Add Asterisk alternative using CSS
Use sidebar; improve text
[reference] fixed wrong class reference in form/types/locale.rst
Fixed syntax + rewording
[#3232] Fixing note about expressions with parameters thanks to @WouterJ
Tried to clarify #3255
Merge pull request #3243 from xabbuh/fix-build-errors

Fix build errors