update documentation for issue #102

sections 2.22 and 2.23. Also update to Appendix B- Change log to reflect
changes.
added new registry types to the Entity[State|Item]RegistryTypeType enumerations. closes #102.
merging in Jasen's updates for clarifying the documentation around malware and threat indicator sharing. closes #65.
merging Jasen's changes that allow for the version datatype on the freebsd:portinfo_test. closes #80.
merging Jasen's changes that clarify the mask attribute. closes #67.
merging Jasen's changes that clarify the schema documentation associated with OVAL Variable values. closes #122.
Merge branch 'master' of https://github.com/OVALProject/Language
updated to clean up

Conflicts:
	specifications/oval-windows-extension-specification.docx
Merge branch 'master' of https://github.com/OVALProject/Language
re-adding oval-windows-extension-specification.docx.
Added implementation notes to partition_state and partition_item
noting that not all mount options may be visible in /etc/mtab
and /proc/mounts, and some places to find them.

Fixes issue #133.
Merge remote-tracking branch 'origin/master' into cmaster