Add alt tag to post author <img> tag in site. #1508.
Move Kramdown to the development dependency section
Move .post .post-content to a <div> to maybe fix weird validation issue. #1508.
Merge pull request #1510 from mojombo/release-1.2

Release v1.2
Release 1.2.0
Merge pull request #1511 from mojombo/fix-validation-errors

Fix W3C Validation Errors On jekyllrb.com
Update history to reflect merge of #1511
Merge pull request #1363 from koron/stop-reverse-lookup

disable reverse lookup
Update history to reflect merge of #1363
Merge pull request #1404 from mojombo/rake-site-releases-new

Add rake task to create new release post
Update history to reflect merge of #1404
Merge pull request #1507 from penibelst/add-site-menu

Make navigation menus reusable
Update history to reflect merge of #1507
Fix link to History page from Release v1.2.0 notes post.
Update History to reflect what happenend in d48f339a1fb8dbf8b2087ef6082e14d3a3e47aef.
Fix merge conflict.
Fix problem link to /docs/history/ in v1.2.0 release post.
Update history and History.markdown so it is consistent with previous release headers.
Fix latest entries without code tag
Revert to #readlines#join, but enclose it in a function

This is necessary to preserve the handling
of \r\n and \n line endings.