update generated intellij iml file
use editor with preview tab for file comments

- refactor: move editor with preview tab used in review dialog standalone class
do not re-use review dialog in abandon action

- except from the editor these dialogs do not share anything
add option to not send notification mails in review dialog

Resolves #70
bump version to v0.8.1
match repository if remote name equals Gerrit project name

Resolves #83
add troubleshooting hint for case when change list is empty

- now a remote whose name equals the Gerrit project name with Gerrit as remote url can be added

Related to issue #83
update README.md and iml-file

- add some more details about building and developing the plugin
- correctly mark test resources directory for rest api client
refactor changes browser

- extract code related to RepositoryChangesBrowser from
  GerritToolWindow to separate provider class
- this refactoring should make it easier to implement some
  of the features requested in #19, #20, #22, #80
Merge pull request #84 from forrert/update-readme

update README.md and iml-file
Merge pull request #85 from forrert/refactor-changes-view

Refactor changes view