Fix indentation
Merge pull request #1134 from lamblin/fix_ordered_set_memleak

Use other impl. of OrderedSet to prevent mem. leak
Add M2050 GPU to the list of speed.
fix for python 2.4
Fix comment order following code review.
Merge pull request #1135 from nouiz/py2.4

Py2.4
Fix for test of exp2 inplace on an int.

It was failing on a windows machine.
import argsort function into theano.tensor
update docstring to reflect that argsort is imported (and sort is shadowed)
add sort method
whitespace cleanup
merge identical inputs as well (seqs and non-seqs)
reuse functionality for outputs
new optimization
fix to optimization to deal with identical nit sot of different lengths
new optimization
re-order optimizations
fix function (look at type for dtype)
fix a few tests
two new tests

Conflicts:
	theano/scan_module/tests/test_scan.py