testing and demo should use current snapshot as a parent
Merge pull request #29 from jerrinot/1.7.3VersionFix

testing and demo should use current snapshot as a parent
Add an example for keyed lookup
Merge remote-tracking branch 'origin/master'

Conflicts:
	chronicle/src/test/java/com/higherfrequencytrading/chronicle/examples/ExampleSimpleWriteReadMain.java
Add an example for keyed lookup