MS-828

Squashed commit of the following:

commit 3af396fe3bd833d25804f35f331f7ce9f3dbaa99
Author: Jacob Shufro <jshufro@appnexus.com>
Date:   Tue Oct 7 13:01:49 2014 -0400

    Add rich's markdowny note

commit 3d61e1ca0940c835cdaaa3132129a00dfaed02c6
Author: Jacob Shufro <jshufro@appnexus.com>
Date:   Mon Oct 6 18:09:18 2014 -0400

    Add rc121 line

commit 7a0d885243e6b8f92998fb2337d56fe4d88bede5
Author: Jacob Shufro <jshufro@appnexus.com>
Date:   Mon Oct 6 18:07:20 2014 -0400

    Add preliminary release notes
MS-821 Improved handling of AN Bundle Resources in SDK
Improvements to mediation testing
MS-832 deperecate DNT in favor of LimitAdTrackingEnabled
MS-768 Basic Mediation Adapter Unit Tests
MS-835 Fix custom close button issue for MRAID expand
Updated Mediated Network SDKs

AdMob SDK Version 6.12.2
Amazon SDK Version 2.1.4
Facebook SDK Version 3.20
MoPub SDK Version 3.2.0
MS-821 Added valid checks for presenting interstitial view controller
MS-878 Prevent KVO from throwing exception
MS-854 Fix formatting of ANLocation when passed to ad server
MS-848 Native API 1.0
MS-848 Native API Merge Fixes
RC2.0 Release Notes
Bumped version string to 2.0
Merge RC2.0 to Github