adds input shape check and label extent to array iterator - add much more explicit documentation - refactor if statements - check shape for all inputs in list
adds input shape check and label extent to array iterator
- add much more explicit documentation
- refactor if statements
- check shape for all inputs in list

NervanaSystems/neon,Jokeren/neon,Jokeren/neon,NervanaSystems/neon,NervanaSystems/neon,NervanaSystems/neon,Jokeren/neon,Jokeren/neon