Changed poms to reflect 1.0.RC2.1-SNAPSHOT
Added initial attempt at making PropertiesFilterProcessor thread-safe.  To be reviewed.
Updating readme to reflect upcoming patch release.
re-ordered release notes to reflect correct release order
merged 1.0.RC2.x branch to prepare for 1.0.RC2.1 release
[maven-release-plugin] prepare release stormpath-sdk-root-1.0.RC2.1
[maven-release-plugin] prepare for next development iteration
merged 1.0.RC2.x branch fixes to dev