Initial work for mount namespaces prototype
Removed kernel module code and associated build system configuration
Consolidate core chos code into chos_multi.c
Add configuration parsing logic to look for table of mounts in /etc/chos.d/<environment_name>
Clean up prototypes in chos.h
Changes to read environment definitions from /etc/chos.d/
Intiial support for environment teardown
* Call mount(2) a second time with MS_REMOUNT to activate all mount options
* Hardcode (for now) that all mounts not starting with /dev/ be mounted wth MS_NODEV