Release 0.7.0

Feature release that contains

• the new "Event"-System (thx @CINO-DE )! - a real biggie that allows for chats and displays in a chat-like log what is happening in SonarQuest based on websocket
• design fixes like a new login dialogue
• user now has an email property (thx @nuhrberg )
• issues now know what SonarQube rule they are based on (thx @nuhrberg )

and the following fixes are also included:

• a cors websocket fix (thx @ChristopherRBrown )
• Sorting issues by severity when choosing them for a quest as gm

and lots more! Big thank you to everybody who helped us make this step possible!

Chris/XHR

Here is the list of all contained fixed issues:
#210 , #211 , #212 , #213 , #214 , #215 , #208 , #205