fix out-of-bounds access in string display functions. close #1675.
add/remove files from android3DModelLoaderExample
make android3DModelLoaderExample consistent with other examples
Merge pull request #1800 from thiagohersan/fix-android3dModelExample

make android3DModelLoaderExample consistent with other android examples
Merge pull request #1801 from thiagohersan/fix-drawString

fix out-of-bounds access in string display functions. close #1675.