Delete the cached matrix before re-calculating it.
Merge pull request #26 from tkihira/hbono/fix-rendertransform

Delete the cached matrix before re-calculating it.
Merge branch 'develop' of https://github.com/tkihira/Tombo.js into hbono/show-dirty-region
Moved Eye.DRAW_DIRTY_REGION to Tombo.DRAW_DIRTY_REGION to avoid a memory leak.