WIP prefcollection
finished first hack of preference  collector
extractor abstract class.  WIP: extract prefs
prefextractor first hack complete
added save and load to wagon
v1.03
examples for prefs
does not hold intent, extras or preff in col/ext-tors
use only one wagon
pref load works. need2fix return false
pref save load works in examples
Merge branch 'master' into preferences
WIP example
all prefs save and load except arraylist
saves/loads arraylist<str>
improved example
1.04 beta
releases/wagon_1.04_beta.jar