Feature/78 start pitest plugin run from ide

[brianneoberson]

Pitest can be run from:

• the context menu button: currently runs pitest on the first class appearing in the file
• the gutter button: runs pitest on the class next to the button
• the tool menu button: runs pitest on the whole project

When one of these actions is performed, the terminal shows the command which was run (including the overwritten class) and the pitest logs. A pitest report is also created/updated.

[lheimbs]

Looks good to me.
Small Note: Use git rebase instead of git merge to apply changes from others to your branch