rework and rename data containers
Move Content Elements, models, form elements, modules to new class files
add Array iterators helping manipulating existing arrays
move helper classes in Helper namespace, Template Modifier in Template namespace
make navbar template configurable
change default navigation behavious
do not add navbar to search index by default
change nav class of nav_default
add default fe_page support classes for rows and cols, jumbotron and remove unnecessary Contao stuff
new quicklink and quicknav templates support formless style
add new options to bootstrap config
make input group of form captcha optional
change namespace of widget class
update language files
modify nerve-racking default behaviour
rename classes
rename runOnce installer method for supporting more installer options
auto render frontend module if it was called using an insert tag
fix offsetUnset call
remove Contao 3.0 compatibility and add icon inititalize methode