Summary:
This PR updates the installation instruction. It missed few crucial information and thus the projects installing flipper as a dependency were facing issues. It addresses the issue #341. It also brings the sample application at par with the documentation.
Pull Request resolved: https://github.com/facebook/flipper/pull/343
Reviewed By: danielbuechele
Differential Revision: D13507298
Pulled By: priteshrnandgaonkar
fbshipit-source-id: 5a4b23d79930cb7eeb491e359b616d3558e260fb
da37ab78bd