more work on AMS JSON-RPC Web interface

Hg-commit: 610511a68dcbe0d01c88ee4f8cc7926484939c33
nightlybuilds: update all scripts to work with the reorganized startup data

[by using confignightly/default script to setup common data]

Hg-commit: d8d5e9f85ae646b1ec1156493dd1474259a61c59
cuda nightlybuild: fix PETSC_EXERN

Hg-commit: 68694490132f1e98095aa7043aaa6c4acda98c97
better docs

Hg-commit: b1f35b87ea99f463ed4b2379025c5c70866a75b9
DMPlex: Small fixes

Hg-commit: 21a4e36869c60dc7cb59e7207a30dd358d1ca91a
DMPlex: Small fix

Hg-commit: 894fa64c1a3f216564983c064d227d7daf3e1f1b
added -snes_ksp_ew to test suite

Hg-commit: ed1cc08344adfceaeae9cf9283ec46ed229d434d
DMPlex: Doc fix

Hg-commit: 3044b89247c858c9832f4680c76831a5cccaa41d