Merge pull request #8 from tommy09ch/master

fix some bugs with food database inside the AddFoodActivity and added a back button to user profile
converted pieview into a fragment and cleaned up code
Merge branch 'psuedo_master'
new files for PieFragment
Merge branch 'psuedo_master'
polished welcome message and some other areas
Merge branch 'psuedo_master'
polished welcome message and some other areas
revised text body for welcome message
Merge branch 'psuedo_master'
added cardlibs and changed AddFoodActivity to scrollview
Merge branch 'psuedo_master'
modified progress bar and added predefined value to portion size
Merge branch 'psuedo_master'
Add auto complete text edit to Add Food Activity and is enable to grab data from nutrients db and fill them in the various editText fields. The data is updatable when user edit the the serving size. Right now, when the user hit the submit button, the food the is saved in the FoodRecordDatabase, which basically keep a record of what foods the user have eaten. And a few changes to other classes and layout.