Add RCDefaultApp prefpane

This commit contains RCDefaultApp version 2.1
Add RCEnvironment prefpane

This commit contains RCEnvironment version 1.4
Add Magic Launch prefpane

This commit contains Magic Launch version 1.4.3
Add Disk Drill.app

This commit contains Disk Drill.app version 2.0
Add Apache Chainsaw.app

This commit contains Apache Chainsaw.app version 2.1.0.  Note that even
though the DMG is labeled "snapshot", this is the only functioning binary
available from apache.org.
Merge pull request #1811 from rolandwalker/chainsaw

Add Apache Chainsaw.app
Merge pull request #1807 from rolandwalker/rcdefaultapp

Add RCDefaultApp prefpane
Merge pull request #1808 from rolandwalker/rcenvironment

Add RCEnvironment prefpane
Merge pull request #1809 from rolandwalker/magic-launch

Add Magic Launch prefpane
Merge pull request #1810 from rolandwalker/disk-drill

Add Disk Drill.app