added previously ignored meta files
some changes on level load failure handling
identities implemented
restructured the project,
created C# Library project,
set up automatic .unitypackage generation,
some minor fixes in code
fixed asset name for .unitypackage generation in build_utils for mac
exporting entire Assets folder instead of just ExternalLibs,
removed and ignored the output .dll files
disabled the console output of the packaging process
removed no longer necessary meta files,
added dependencies
correction of custom build commands for mac,
some cleanup
more fixes on mac config
more fixes for mac
changes in identities dialog
implemented request idle timeout
identity registration dialog is now scaled based on screen height
changes in identity ui,
added apple device recognition utility,
some minor fixes
removed name and added model and os in device registration call,
renamed the command from "registerIdentity" to "registerDevice"
some minor fixes,
changed data sync logic
Merge branch 'dev' into doc

Conflicts:
	src/saltr/SLTUnity.cs
	src/saltr/game/SLTBoard.cs