DOC: Added section about column-major arrays to perf tips

Also added a note to the noteworthy differences from Python section
Merge branch 'master' into arrOrderPerf
DOC: Code/timings now appear in same order

Also removed "Remember" from section title

Also added link in arrays section
DOC: Changed title of column-major perf tip section

Restored the "remember" that was there to match
imperative nature of other titles
Merge pull request #4921 from spencerlyon2/arrOrderPerf

DOC: Added section about column-major arrays to perf tips