Sahara/ReleaseNotes/0.2.1

Features implemented:


 * diskimage-builder elements for Ubuntu and Fedora has been merged to one common element;
 * savanna now displays validation and cluster provisioning errors at UI;
 * vanilla plugin is now supports deletion of nodes while scaling cluster;
 * a huge pack of integration tests has been added to cover core functionality.

Bug fixes:


 * bunch of UI improvements and minor bug-fixes;
 * improvements and minor bug-fixes in general validation;
 * improvements and minor bug-fixes in Hadoop-related validation;
 * cleaned up documentation;
 * minor bug-fixes in DIB elements for Hadoop;
 * general minor bug-fixes;
 * savanna now works correctly with MySQL as DB backend.

Complete list of resolved bugs and implemented features can be found here:


 * https://launchpad.net/savanna/0.2/0.2.1-rc1
 * https://launchpad.net/savanna/0.2/0.2.1-rc2