README: Clarify handling of passwords/credentials

Fixes #51.
Added Appstr.io install page
Updated Appstr install page
Release v2.0.0
Release v2.0.1
Release v2.0.2
Merge branch 'gh-pages'
Published with http://benweet.github.io/stackedit/
Merge pull request #52 from certik/patch-1

README: Clarify handling of passwords/credentials
Merge branch 'master' of github.com:benweet/stackedit
Published with http://benweet.github.io/stackedit/
Published with http://benweet.github.io/stackedit/
Published with http://benweet.github.io/stackedit/
Merge branch 'master' of github.com:benweet/stackedit
Upgrade to Bootstrap 3
Upgrade to Bootstrap 3
Upgrade to Bootstrap 3
Upgrade to Bootstrap 3
Upgrade to Bootstrap 3
Upgrade to Bootstrap 3