Update introduction message for add query activity.
Start adding filters and available filters in AddQueryActivity.java
Merge branch 'master' into addQuery

Conflicts:
	Super ML (Mobile App)/src/main/java/com/nbempire/superml/component/activity/HomeActivity.java
Return product.query, filters and available filters too after finding the average price of a product;
Pass the entire product object to AddQueryActivity.java;
Create domain objects for category, applied filters and available filters;
Display available filters as ListView in AddQueryActivity.java;
Update FilterAdapter.java GUI
Merge branch 'master' into addQuery
Add category label in AddQueryActivity.java;
Merge branch 'master' into addQuery
Update application icon.
Add category below search button.