Fixed README.md
Fixed minor bug related with the db credentials
Updated the issue model changing the assignee attibute

- Improvements into code style
Merge remote-tracking branch 'origin/hotfix/load-issue-fixture'

Conflicts:
	src/Kreta/FixturesBundle/DataFixtures/ORM/LoadIssueData.php
Updated the columns name to be displayed with underscore
Fixed  spec
Added title and description attributes into Issue and fixed project Name and short name attar length
Fixed issue with fixtures
Added title and description to issues