Optimized scaling in Transformer2D.

Multiple Touch Managers in a scene are now handled correctly (issue T…

…ouchScript#136).

Version 6.2

Fixed LongPress example with timeScale = 0.

Packaging required dlls with examples.

Updated asset store plugin.

Updated packaging scripts.

Updated build scripts.

Recompiled DLLs.

Fixed windows touch input in 64-bit builds.