Fix spacing
Properly destroy WebViewClient and WebChromeClient before setting them to null
Add context menu for images to save them.

The WRITE_EXTERNAL_STORAGE permission is now required.
Uses Picasso to download the images.
Update to version 1.5

Change log:
- Save images by long pressing them (requires WRITE_EXTERNAL_STORAGE permission)
- Support for basic Facebook site
- Fix drawer menu list so that it properly scrolls on smaller devices
- Serbian translation
- Small bug fixes