define new coding standards
split between modules and src files
switch to space indents
fix coding style violations
refactor prepareRules for reducing cyclomatic complexity by introducing buildParamValue() and filterParamValue()
reuse filterParamValue() in getParameterFilterWidgets() to reduce cyclomatic complexity
Suppress warnings for global array access
complete documentation of added methods
add php 5.6 to travis file
fix broken commit after reverting changes
introduce buildParameterFilterWidgets method to reduce cyclomatic complexitity
readd accidently removed contao-toolbox and remove mm coding standards
unify code indents
Merge pull request #10 from dmolineus/tng

Ref. MetaModels/core#602
Thanks to @dmolineus