add missing import

[WIP] Adding GpuJoin.c_code to cuda/basic_ops.py

doc: fix typo

Doc

Crash gpu reduce 1111

doc/library/tensor/basic.txt: add alloc() to the list of ways of creating a tensor

Fix error reporting

Split file

Update documentation that was pointing to deprecated or removed function...

Cleanup

Fix SharedVar.value property.

reported by Drew Duncan

fix gh-1474

This was reported by @abergeron

moved init of stack variables to prevent error: jump to label ‘__label_9’ crosses initialization of ‘shape_%(cdna)s[nd]’

improved indentation, added exeption when not all inputs have the same ndims, tried to improve some memory / reference counting issues, removed initialisation of variable sized arrays, which causes problems under windows