Changed connectTo signature to be more similar to Node.js API
Updated signature of addSharedpoint_Folder to be like Node.js API
Merge branch 'master' into issue_98__Use_WebP2P_as_a_SharedWorker

Conflicts:
	js/shareit-core/webp2pWorker.js
	js/shareit-core/webp2p_backend.js
Using callback on cacheBackup_import
Added callback for files_downloading
Set callback for files_sharing
Set callback for numPeers
Renamed Webp2pWorker to Webp2pRemote
Added callback for sharedpointsManager methods
Using notifications for events
Using callback when interface object is ready
Fixed bugs
Fixed style on db.js
Changed db.js API to Node.js style
Adapted signatures to use Node.js-like callbacks
Importing files inside WebWorker (not working yet)
Removed all references to 'window' object on internal code
Fixed bug
Using local fixed version of sha512.js file
Removed references to 'window' object to other libraries of mine