HCOLL-121  updated the version of the source plugin
Fix for occasional corruption of data files

The count applied to a new data file was held in a
VanillaDataCache, which was shared across all
VanillaAppender instances.  If an Appender was
garbage collected (through WeakReference) it was
possible for the count to point to an existing
data file, which caused the file to be overwritten.

Changed VanillaAppender so that data count is held
per appender instance.
Update FAQ.md
Update FAQ.md
Update FAQ.md
Merge pull request #78 from brasslock/master

Data file corruption in VanillaChronicle
CHRON-58 Test should run without exceptions
Merge pull request #91 from lburgazzoli/HFT-CHRON-58

CHRON-58 Test should run without exceptions
Fix VanillaChronicle.lastIndex

lastIndex() was not using the index file count to determine
the returned index value.