integrate adcirc test suite into asgsh

[wwlwpd]

this is a nice testsuite and we'd really benefit from being able to run it

Specific ASGS needs are:

• once adcircResultsComparison is added to work/makefile upstream, add support to this in cloud/general/init-adcirc.sh
• create a command in asgsh to call the run scripts interactively (needs to warn if on a head node and not an interactive or batch environment)
• create a command option and batch generic batch queue script that will submit a job to run the test suite
• create a command option that only runs serial tests without having to get into an interactive compute node session or submit via queue
• create README

[wwlwpd]

requires minor changes to all 3 repos: adcirc-cg, asgs, adcirc-cg-testsuite

[wwlwpd]

https://github.com/wwlwpd/adcirc-cg/commit/d17de9b878d4313b35181f275b8f2d87ef12183d
wwwpwd-dev/adcirc-cg-testsuite@d5d3930 (see adcirc/adcirc-testsuite#8)

have not made changes in ASGS, but will once I am advised about the above changes