Update news to include topk ops.

Remove ViewOp subclass during optimization

Prepare release 0.10.0beta3

TopKOp implementation

Revert part of "Alloc OpRemove to accept a class to remove. Tested by test_gradien.py:test_grad_clip"

This reverts part of commit 0e2d7a79.

We don't need that and it is safer to not introduce it.

Fix min function to work with uint* and bool

Fix conda package builds

Fix pygpu dev version parsing

Fix tests error in DebugMode. Make DebugMode more pickable

Add the setup to build conda packages

buildbot mac no GPU

Fix a test in DebugMode by makeing _Maker reuse its parent class create method. The sub-version don't seem to add anything useful.

Fix pickling of DebugMode by using the string of reasons. Theano local optimizer aren't picklable most of the time.