Added a new RegRipper plugin to determine processor architecture and modified ExtractRegistry.java to create a new TSK_OS_INFO artifact with a single TSK_PROCESSOR_ARCHITECTURE attribute.
- Modified ExtractRegistry.java to attach Windows version info to TSK_OS_INFO artifact instead of TSK_INSTALLED_PROGRAM.
- Added new icon for "Operating System Information" to UI and Report.
- Added TSK_OS_INFO artifact to report.
Merge pull request #901 from esaunders/volatility_module

Added a new RegRipper plugin to determine processor architecture and mod...
Added comment about python core libraries