initial commit for "Disovery and Distribution" section
Merge remote-tracking branch 'upstream/master' into discovery_and_distribution
adding image resources for "controlling appearance on social sites" article
revised text for "controlling appearance on social sites"
slight change to "Controlling Appearance on Social Sites"
Merge remote-tracking branch 'upstream/master' into discovery_and_distribution
added sample code for social-sites article
added agektmr
updated discovery and distribution section
Merge pull request #714 from agektmr/discovery_and_distribution

Discovery and Distribution - Controlling Appearance on Social Sites