add submodule
Revert "add submodule"

This reverts commit 27a4c029f5209dac8bd2181e9dd85cf5ebbe38e2.
add submodule
remove
add submodule in new location
remove unneeded files
update
Update to the latest from EM
Re-import expression machine since it has a new directory structure. Also remove post-build scripts since that's handled in the expression machine repo
Re-order files/folders
move submodule
Update header path for unit tests
[WIP] flex scanner for stylesheet parser
add lib to test