-fixed bug(s) in rex where commands like setenv("FOO_${BAH}", "EEK") are accepted,
 but the new value is not tracked because the key is not expanded
-fixed bug in rex where legit bash syntax ${!FOO} was causing the NamespaceFormatter
 to fail.
-fixed bug in rex where it was not possible to iterate over 'env'.
-fixed bug where accessing an env-var like "env['FOO']" failed if it was
 not accessed earlier like "env.FOO"
-improved rex exception printouts, added non-catch config setting for debugging
-added timing tracking, for debugging purposes
* added 'command' to release_hook to be able to add commands to execute prior and after release process.
* requires sh module
minor cosmetic update
upgraded
-added env-var expansion in rezconfig
Merge remote-tracking branch 'allan/testing_1' into testing_1
-fixed bugs in build process and git vcs stopping rez-release from working
* added quiet and on_error settings to control the output level and what to do in case of command execution error
* replaced 'sudo' with 'user' where user=='root' is equivalent to sudo==True; this also allows to run commands as a specific user
Merge remote-tracking branch 'allan/testing_1' into testing_1
upgraded
added missing init file for sh
added missing import statement for Or
added missing defaults to rezconfigwq
fixed pre_release and post_release headers
changed schema to use [] instead of ()
commented out the use of env in Command