Add settings ActionBar icon
Add a settings menu on the action bar
Add Settings Activity basic layout
Wire basic intent call to Settings activity

- User can click on "settings" which allows selection of advanced search options to filter results
- Fixes #2
Add advance search filters.

- User can configure advanced search filters (Fixes #3)
- Subsequent searches will have any filters applied to the search results (Fixes #4)
Add title below image results
Add Endless Scrolling to the gridview.

- User can scroll down “infinitely” to continue loading more image results (up to 8 pages) (Fixes #6)
Update README
Merge pull request #15 from josemontesdeoca/dev

Dev