This reverts commit 8402be3b.

Ran these suckers through ImageOptim, which crunched 'em down real nice.

 .../images/bulk_email/GooglePlusIcon_gray.png       | Bin 680 -> 678 bytes
 lms/static/images/bulk_email/LinkedInIcon.png       | Bin 751 -> 417 bytes
 lms/static/images/bulk_email/MeetupIcon.png         | Bin 1283 -> 679 bytes
 lms/static/images/bulk_email/MeetupIcon_gray.png    | Bin 685 -> 678 bytes
 lms/static/images/bulk_email/TwitterIcon.png        | Bin 998 -> 517 bytes
 lms/static/images/bulk_email/TwitterIcon_gray.png   | Bin 518 -> 515 bytes
 lms/static/images/bulk_email/VKontakteIcon.png      | Bin 2480 -> 1272 bytes
 lms/static/images/bulk_email/VKontakteIcon_gray.png | Bin 3099 -> 3092 bytes
 lms/static/images/bulk_email/YoutubeIcon.png        | Bin 1964 -> 1856 bytes
 lms/static/images/bulk_email/YoutubeIcon_gray.png   | Bin 1961 -> 1878 bytes
 lms/static/images/bulk_email/edXHeaderImage.jpg     | Bin 25814 -> 24906 bytes
 lms/static/images/bullet-closed.png                 | Bin 230 -> 191 bytes
 lms/static/images/bullet-open.png                   | Bin 219 -> 188 bytes
 lms/static/images/default-badges/honor.png          | Bin 20814 -> 13316 bytes
 lms/static/images/default-badges/professional.png   | Bin 21855 -> 14603 bytes
 lms/static/images/default-badges/verified.png       | Bin 21855 -> 14603 bytes
 lms/static/images/edx-theme/edx-logo-77x36.png      | Bin 5139 -> 3674 bytes
 lms/static/images/green-pointer.png                 | Bin 3474 -> 887 bytes
 lms/static/images/homepage-hero-video-thumb.jpg     | Bin 4537 -> 4517 bytes
 lms/static/images/honor-ribbon.png                  | Bin 5956 -> 4251 bytes
 lms/static/images/icon-sm-professional.png          | Bin 2892 -> 1883 bytes
 lms/static/images/icon-sm-verified.png              | Bin 3247 -> 776 bytes
 lms/static/images/icon-sm-xseries-white.png         | Bin 706 -> 475 bytes
 lms/static/images/large-white-error-icon.png        | Bin 1800 -> 951 bytes
 lms/static/images/link-icon.png                     | Bin 326 -> 296 bytes
 25 files changed, 0 insertions(+), 0 deletions(-)

 common/test/data/xml_dag/static/just_a_test.jpg    | Bin 547 -> 517 bytes
 .../test_microsite/images/background-image.jpg     | Bin 160660 -> 160625 bytes
 .../test_microsite/images/header-logo.png          | Bin 1215 -> 1212 bytes
 docs/en_us/architecture/locator_ubiquity.jpg       | Bin 51876 -> 47455 bytes
 docs/en_us/architecture/presplit.jpg               | Bin 43129 -> 38944 bytes
 docs/en_us/architecture/studio mapping.jpg         | Bin 48247 -> 43786 bytes
 .../enrollment_api/source/_static/homepage-bg.jpg  | Bin 160660 -> 160625 bytes
 docs/en_us/internal/test_pyramid.png               | Bin 24698 -> 17598 bytes
 .../platform_api/source/_static/homepage-bg.jpg    | Bin 160660 -> 160625 bytes
 .../shared/images/Announcement_subscriptions.png   | Bin 43413 -> 15474 bytes
 lms/static/certificates/images/backpack-logo.png   | Bin 2107 -> 1112 bytes
 lms/static/certificates/images/backpack-ui.png     | Bin 76558 -> 54810 bytes
 lms/static/certificates/images/bg-verified.png     | Bin 25152 -> 5169 bytes
 lms/static/certificates/images/demo-sig1.png       | Bin 3852 -> 2099 bytes
 lms/static/certificates/images/demo-sig2.png       | Bin 3695 -> 1990 bytes
 lms/static/certificates/images/demo-sig3.png       | Bin 7315 -> 3721 bytes
 .../certificates/images/demo-user-profile.png      | Bin 61749 -> 40719 bytes
 lms/static/certificates/images/ico-honor.png       | Bin 59443 -> 35743 bytes
 .../certificates/images/ico-mozillaopenbadges.png  | Bin 3638 -> 1870 bytes
 lms/static/certificates/images/ico-verified.png    | Bin 59571 -> 35713 bytes
 lms/static/images/app/google_play_badge_45.png     | Bin 8913 -> 4548 bytes
 lms/static/images/bg-footer-divider.jpg            | Bin 416 -> 390 bytes
 lms/static/images/bg-texture.png                   | Bin 10028 -> 2092 bytes
 lms/static/images/bulk_email/FacebookIcon.png      | Bin 550 -> 333 bytes
 lms/static/images/bulk_email/GooglePlusIcon.png    | Bin 1286 -> 679 bytes
 25 files changed, 0 insertions(+), 0 deletions(-)

adding in gray versions of social icons for use in new email template. Using new name to ensure old links and existing emails using older templates still stay active

Adds the edX Marketing-approved template as html default.