Update Friday - 2019.06.21

Feature

* player shadow skill

* item description ui

* level difficulty description ui

Enhancement

* remove player bullet life time

* shield bullet destroy bullets for visibility

* narrow down player attack angle

* increase enemy hp

*  update player hitbox image

* update pickup image

* update pickup effect

Bugfix

* prevent boss hurt player after died

* only sorting in deploy render

* render props as deploy layer

* enemy mark render under deploy layer

* prevent props generate on deploy

* fix shield collision after hit 5 bullets

* fix fort shot collision between non wall entity

* prevent bottle boss black balls are pushed by special bullet

* fix wall sawblade trap deployment

* fix player money ui display

* fix floating text under sprite

* fix boss portal unlock counter

* prevent pickup buff keep tracing player when stack is full

* prevent spike block enemy