0.4.3

[fix]

• fix alpha test
• add textureLoader error handler

0.4.2

[feat]:

• add config param backgroundColor

[fix]:

• remove useless getRoundImage function
• fix loadImage sometimes now work issue #4
• fix camera null error
• remove some useless api

[chore]:

• add travis ci

0.4.1

[feat]

• add anti-aliasing
• add image white border
• add glsl-loader, make shaders Configurable

[fix]

• fix duplicate highlight bug