new frontend option 'featureConfiguration' added
this option needs 1 argument, which is the path of the featureConfiguration file, for example BusyBoxDefConfig.config

After creating the ifdeftoif option struct, there now is an init function which uses the featureConfiguration file to assign the values '0' and '1' to ifdeftoif features

The main or 'filename' + "_main" function calls the above mentioned function to assign values to the ifdeftoif features.
Merge remote-tracking branch 'origin/master'