Add gaps between passes in HTML index file

It can be difficult to tell where the modules for one pass end and the next
pass begin.  Add a little gap between passes to make it more clear.
Merge remote-tracking branch 'chapel-lang/master' into addGapsInHtmlIndex
Taking Tom's comments into account, I switch the pragma to "never noinit" and
added it to the remaining records in Atomics.chpl
Okay, one last name change: "never noinit" -> "ignore noinit" to avoid double
negatives but still show the purpose of the pragma.
Merge pull request #28 from lydia-duncan/pragmaNeverNoinit

Pragma ignore noinit
Merge pull request #17 from daviditen/addGapsInHtmlIndex

 Add gaps between passes in HTML index file
Merge branch 'master' into noinitReturnTemps

Grabbing my pragma "ignore noinit" change.
Updating the channel and file records for the changed pragma syntax

This is what I get for using stuff that is being reviewed to continue on, heh.