POC Version
Bug Fix for PlayerScript.cs

(1) Fix movement didn't reset to 0 after keyboard action.
(2) Fix walk animation didn't stop after reaching the mouse target
position.
POC for dialog box

Sorry for the big delay==.... because of the band stuff....

This is the poc for showing very basic dialog box when the player move
in the conversation area. For the commentted code, it shows how to make
a moveable dialog box following the player.

Next:
- dynamic dialog box size
- dialog box with conversation
Revert "POC for dialog box"

This reverts commit d2304a17a0038fb25f313c1fbff3fdc6f41092aa.