Add an InputStream constructor to WavefrontObject

It is said that Resource Packs will return InputStreams. And I like putting my models into texture packs which, obviously, give InputStreams rather than URLs.
Add cloud height to WorldType
Fix render colour on bottom of fluids
Fix small derp
Merge pull request #705 from heldplayer/fluids

Fix render colour on bottom of fluids
Merge pull request #706 from heldplayer/fluidRendering

Fix small derp
Merge pull request #704 from StormTiberius/master

Adds cloud height to WorldType
Merge pull request #610 from purpleposeidon/patch-1

Add an InputStream constructor to WavefrontObject
Merge branch 'miscchanges'