Fix typo in Greek translation.

Closes #424
Update slovak locale

Closes #431
source-editor.js: add missing semicolon.
Update README.md.

Add title to the Google play image and use code syntax where applicable.
Whitespace normalization.

Use spaces consistently and trim trailing spaces.
Closes #425
Fix xml formatting in login.xml
Losslessly compress png files.

Savings approximately -110KB.
Closes #426
Do not show 'Edit' and 'Close' issues menu to non-collaborators

Refs #413
Non-collaborator restrictions on browsing issues.

Non-collaborators are not allowed to change
assignee/milestones/labels when browsing issues.
Refs #413
Override annotations in onClick()
Non-collaborator restrictions in EditIssueActivity

Made it so that issue administration options only show up
if the user is a collaborator on this repository
Closes #419
Move some methods to keep consistency through the class, clean imports
Use Finder to find views
Remove unused import
Fix a bug with issues dashboard

Issues from issue dashboard were not displaying because of
null repository variable.
Update android-maven plugin to 3.7.0
Fix an issue with hardware keyboard is not displaying in issue comment

Refs #356
Implement two-factor authentication support
Camel case method name
Extract scopes list as a static final variable