Cleaned up base_initializr.html.twig

jQuery is no longer included in the "foot_script" block in base.html.twig, so this should suffice.
Fix typo
Added way to control form-group bc compat
Merge pull request #740 from mdeletter/patch-1

Fixed typo
Merge pull request #739 from mweimerskirch/patch-4

Cleaned up base_initializr.html.twig
Only create one instance of MenuConverter
Merge pull request #744 from isometriks/master

Only create one instance of MenuConverter
Not making dropdowns of items affected by depth limit
Proposition to not use Assetic in examples.

Otherwise they would be compiled and dumped into users project directory.
Missing PHPDoc @throws
Update fields.html.twig

fixes #745
Merge pull request #749 from james75/master

Update fields.html.twig
Merge pull request #746 from kaiwa/patch-2

Not making dropdowns of items affected by depth limit
Merge pull request #747 from hyperunknown/patch-base-initializr

Proposition to not use Assetic in examples.
Merge pull request #748 from hyperunknown/patch-phpdoc-menu-extension

Missing PHPDoc @throws
Fixed doc -
Merge branch 'master' of git://github.com/phiamo/MopaBootstrapBundle
fixed gitignore - Fixes #752
Added possibility to control inverted icons from the type
Merge branch 'master' of git://github.com/phiamo/MopaBootstrapBundle