Update README.md
refactoring
Update images and colours
More colour changes
Add icons and revert some changes
More colour changes and miscellaneous things
Click either button related to the category colour will open a dialog to change the colour
Bug fixes
Refactoring and 'Tasks' added to every menu
Took out unused evalNotes editText and experimented with some colour changes
Fix bug where changing the category of an eval will not properly update the category