This fixes colada keyframe example but breaks helpers. Time to refactor Helpers...

3DSMax Exporter - Corrected specular export, support Phong

Made a correction to the way the specular coefficient is exported; this was using the 3DSMax "Glossiness" attribute. It has been corrected to use the 3DSMax material "Specular Level". The "Glossiness" has been correctly remapped to the "Shininess" three.js attribute. 

Additionally included Phong shading, so the three.js Phong material will be used if Phong when used in 3DSMax - without this the bump maps are disregarded as they aren't rendered with Lambert materials (default material when unspecified). Blinn/Metal ShaderType materials will continue to be exported as Lambert.

Fixed file path for v2.7x users.

Fixed file path for v2.7x users.

Conflicts:
	src/renderers/WebGLRenderer.js

OBJLoader: made scientific notation regexes case-insensitive

improve compressed texture availability check

PVRloader - support v2 and v3 format

  - convert available format to real Array
  - test if texture glFormat is found in supported formats

note : the test against supported format before upload log an explicit warning but can't prevent gl warnings during draw call (texture is invalid)