Ran ispell on Task_Parallelism_and_Synchronization.tex
Preliminary version of special functions proposal.
First update.
Make narrowWideReferences its own pass.
Dereference widenMap at the call site.
Update compilerPerformance.perfkeys with new pass.
Merge remote-tracking branch 'upstream/master'
io: add function isDir

This function will check whether the given path is a directory.
io: add isFile

This function will check whether the given path is a regular file.
Add an example of using the targetLocales method on arrays
Fix passing sync/single variables by ref/blank intent.
Catching up on past 6 weeks regressions...
Merge branch 'master' of github.com:chapel-lang/chapel into dist-primer-lsq
Adding exampels for the 'localSubdomain(s)' functions
Add a multilocale test for chdir/cwd().

Suggested by Michael.  Multi-task one is next.
Update the comments on chdir and cwd to represent their behavior in multilocale
situations.
Followed up on reviewers' comments.
Added tests. Retired a future.
Added another isX test; strengthened type-tests.chpl.
type-tests.todo.chpl is now covered by type-tests.chpl,
so I removed it.
More test adjustments.
Also allowed sync/singles in tuple *types*
- see parallel/sync/diten/tupleOfSync.chpl
Fix list_view() and aid() debugging tools.