Introduce Application Default Credentials concept

Replace the 'Default Credentials' concept with the 'Application Default Credentials' concept.
Merge pull request #16 from orestica/patch-1

Introduce Application Default Credentials concept
Documentation Updates

Updated copyright year to 2014 in LICENSE

Changed FAQ to FAQ.md for better readability

Updated README.md with for clarity and organization
Updated README.md Links

Updated stale links regarding dependencies in README.md
updated FAQ.md

reduced size of Q
Documentation Header Spacing

Added single spaces between # and text of headers
Merge pull request #17 from mmattioli/master

Documentation Updates