Initial commit
Added change color button
Created second activity class and layout. Added action to button on the Main Activity - when press on it second activity will be opened.
Added 4 buttons to second activity and prepared action to open preview activity. Finished with this branch.
Added third activity with color preview
Added buttons to preview activity to perform back navigation logic.
Added comments and renamed some variable to follow android code style conventions
Fixed few issues (last - rename package)
Finished fixing issues
Changed comments at the beginning of files
Changed after second reviewing
Merge pull request #2 from james2388/development

Development to master merge.