Use JSON::PP if available

JSON::PP ships with Perl v5.14, so allowing JSON::PP means
anyone with v5.14+ can use it without needing to install from CPAN.

JSON::XS will still make things faster, of course.
make dev-install do individual symlinks
make json unquoting regex more complete
just do the submodule updates
make submodules use public urls
not recursive for now
better msg for (un)trust
notes
notes
make `git hub clone` be smarter

- allow multiple repos
- changed doc and fixed a few typos
add ../ to clone dir prefixes
add travis.yml
update submodule
submodule update
Move git-hub to test-more-bash

Was on test-simple-bash. Also brings in bashplus.
Rename files to new Bash+ style
added bash+. first step.
submodule update
switch bash code to 2 char indent
submodule update