Also move take to subtensor.py
This allow subtensor.py to depend on basic.py. This is a more sensible dependency.

This make tensor/basic.py at 191k, so lower then 200k for gh-651.

This advance ticket gh-651

Gh1461

This is needed to make the new GpuImages2Neibs ignore_border mode pass.

Also make sure the input is on the CPU, so a transfer is added when needed.

Tests

Fix a test error related type typenum of ulonglong and uint64 being different even if they are equivalent.

Minor fixes

Fix a crash on Mac OS when sys.prefix is different from its realpath