Create README.md

Add install and run steps
Update README.md

Correct README markdown syntax.
Merge pull request #10 from mihaineacsu/1-db-wrappers

Add wrappers over db insert and find #1
Merge pull request #11 from mihaineacsu/2-templates

2 templates
Merge pull request #12 from mihaineacsu/3-add-map

3 add map
Merge branch 'master' of github.com:mihaineacsu/TweetMaps
Add passport dependecy