refactor(leapHelperService): move functions from helper to leapService
refactor(leapConfig): extract Configuration aspect to an own service
refactor(leapFn): extract additional functions aspect to an own service
chore(*): remove unused injections that are redundant due refactoring
chore(leanFn): add comment for service api function wrapper
Merge pull request #37 from angular-leap/refactor-leapHelperService

Refactoring of core-services