CUBLAS readme fixes

[dlesnoff]

Fix #88. Also fix broken links. The documentation links did not have correct header names, and was thus redirecting to the start of the CUBLAS documentation instead of the function documentation.

My editor automatically removes the trailing whitespaces. Sorry if it makes the git diff harder to read. Are these trailing whitespaces important? It did not look so to me.

[dlesnoff]

Whitespaces seem to be pretty consistent. You probably want to keep them. I will try to revert the changes and disable automatic removal of trailing whitespaces.

[dlesnoff]

Removed whitespace modifications and made a shell script to fix all obsolete documentation links. @pmajch @maheshkha Ready for review.