Merge pull request #4 from NaNyanNyan/master

contract
integrating the contact us screen with the home screen
add the .gitignore file
.gitignore
clean up unwanted runtime files
amend .gitignore file
infection and database architecture setup

Setting up the infection, infection category, antibiotic objects;
infection and category list screens; database architecture.
Merge pull request #2 from yjfJeff/master

hello