initial checkin of a failing unit test.
fix backtrace-printing bug.
cmake bugfix: don't ignore multiple arguments
More libiberty-related fixes
work-around for bug #696

This is a serious libiberty bug.

Changing the header-file include iorder seems to fix it.
Add variable-search utils that deal with quoting

A variable is variable only if it is not quoted.
Perform checks for quoted variables
Additional quoted variable checks in the utils
Fix up the buggy quote test so that it passes
Check for unquoted variables only
tighen up some of the quoted-variable checks.
Minor cleanup
Merge pull request #1093 from linas/buggy

Bug fix for bug #1092 and bug #696