Fix doc of set_subtensor and inc_subtensor.
Add new section in doc. Otherwise, it was included in the "Shaping and Shuffling" section.
Merge pull request #1478 from micklat/master

doc/library/tensor/basic.txt: add alloc() to the list of ways of creating a tensor
Update Ubuntu doc to specify reboot is needed and tell about the new DEB option.
More verbose version of the code.
Fix crash reported by Arjun Jain on the mailing list with gpu reduction 1111 and strided inputs.
Merge pull request #1480 from nouiz/crash_gpu_reduce_1111

Crash gpu reduce 1111
Merge pull request #1479 from nouiz/doc

Doc
doc: fix typo