Add UInt32/64 Integer Types
Fix size of uint32
Test Uint types with SimpleDataTest
Fixes for uint types

 - fix getOptimalChunkDims to prevent 0 values
 - print chunk dims in error case
 - include new basetypes
 - fix SimpleDataTest
Add apt-get update to travis file
Remove superfluous apt-get update
Merge pull request #54 from ComputationalRadiationPhysics/uint-types

Uint types