Add parallel execution of make to lots of testing scripts.
Do not use parallel execution when calling `make check`.

start_test breaks because the backend C build (inside chpl compiler) calls
make. However, when that make starts up, it assumes it is a submake and
attempts to communicate with a job server that does not exist. There is
probably some way to fix that (one thought is to set .NOTPARALLEL in the
Makefile.exe), but it is simple enough to call regular make with parallel
execution and then make a second call to make check.
Merge branch 'para-make' of github.com:thomasvandoren/chapel into test-with-para-build
Merge branch 'master' of github.com:chapel-lang/chapel into test-with-para-build

Conflicts:
	util/cron/nightly
	util/cron/test-cray-xc-knc-default-examples.bash
Merge branch 'master' of github.com:chapel-lang/chapel into test-with-para-build
Merge branch 'master' of github.com:chapel-lang/chapel into test-with-para-build
Pull all make args in smokeTest into single variable.

For simplicity...
Merge branch 'master' of github.com:chapel-lang/chapel into test-with-para-build
Merge pull request #634 from thomasvandoren/test-with-para-build

Add parallel execution of make to lots of testing scripts.

Now that parallel execution is available for makefile (since #632), update several test scripts to use it.

For travis testing, the build time drops by ~1min for both configurations (it's a little hard to say definitively since there is quite a bit or variation in the travis build times).

r: @ronawho
Extend AstVisitor to cover WhileDoStmt/DoWhileStmt/ForLoop.  Update the Dump Routines to provide initial printers for these.
Don't use --fast in correctness testing, and don't use --no-cc-warnings at all
Tweak
Also removing --no-cc-warnings for explicit/
Test the m-lsms.par-forall.chpl future under the default configuration only.
Merge pull request #808 from vasslitvinov/skip--m-lsms.par-forall.chpl--on--most--configurations

Test the m-lsms.par-forall.chpl future under the default configuration only.

This test behaves differently under various configurations,
so test it under the default configuration only.
See .future for more info.
Merge pull request #807 from noakesmichael/Visitor

Extend While/For loops to support Visitor pattern

1) Extend WhileDoStmt, DoWhileStmt, ForLoop to support the AstVisitor pattern.

2) Update AstVisitor to know about WhileDoStmt, DoWhileStmt, ForLoop

3) Extend the three debugging "AstDump" routines to provide preliminary logging for these nodes.
I will revisit these when the internal representation for the new nodes stabilizes.


Compiled: STD clang/darwin, STD gcc/linux64, LLVM gcc/linux64
Testing:     Minimal.  This code is not executed by any regression tests
Review:    None
Merge pull request #806 from benharsh/minimd-fix-compopts

Clean up miniMD compopts

Remove "--fast" from correctness compopts, and remove "--no-cc-warnings" from both compopts.