Wallet can now create extended public for chrome app side derivation (for way faster derivation)
ExtendedPublicKey can now be derived
Ensure xpub fingerprint is interpreted as unsigned int
Fix public derivation cache management + derivation path interpretation
Refactoring wallet layout recovery algorithm
Working on a html5 worker for public derivation
Done derivation worker implementation + derivation utils + cache command in order to allow the worker to store data in the application cache
Refactor wallet layout recovery with public derivation
Merge branch 'develop' of github.com:LedgerHQ/ledger-wallet-chrome into feature/public_derivation

Conflicts:
	app/src/tasks/operations_synchronization_task.coffee