Fix Eclipse Settings

minor fix for eclipse configuration
Merge remote-tracking branch 'upstream/master'
Refactor MainActivity
Implement Choose File dialog window

- Create ChooseFileDialogFragment class
- Refactor XML layouts to use string resources
- Refactor XML styles to remove uneeded background.xml and per item
settings
- Update Android Support Libraries
Merge pull request #11 from pdpiech/master

Refactor MainActivity and implement Choose File dialog window