Update README.md

triva app with some tests

update README with where to buy

tracking inventory with tests

text sharing with some tests

simple text sharing broken tests

url shortener wip with some tests

url shortener wip with some tests

remove tasks.db

a todo list with external data source and tests

a todo list with external data source and tests

time service with tests

movie recomendations with some tests

minor code improvement to adding numbers

minor code improvement to adding numbers