Revert to #readlines#join, but enclose it in a function

This is necessary to preserve the handling
of \r\n and \n line endings.
Update redcarpet to 2.3.0
Fix 1.2.0 release post title
Merge pull request #1512 from penibelst/fix-history-markup

Fix latest entries in history without code tag
Update history to reflect merge of #1512
Whoops, spelled 'detach' incorrectly.

https://twitter.com/strangerpixel/status/376257545968824320
Updated jekyll.gemspec manifest site/news/[index.md][releases/index.md] to reflect reality- [index.html]
Merge pull request #1522 from jaybe-jekyll/master

Updated jekyll.gemspec manifest site/news/[index.md][releases/index.md] ...
Update history to reflect merge of #1522
Update gemspec
a patch for the issue: [Liquid doesn't render my partial · Issue #1519 · mojombo/jekyll](https://github.com/mojombo/jekyll/issues/1519)
Merge pull request #1515 from drewish/redcarpet-2.3

Update redcarpet to 2.3.0
Update history to reflect merge of #1515
rename the new function
mute LSI output in tests
Update site/docs/history.md as per #1512.
Merge pull request #1525 from zerobase/issue1519

Force rendering of Include tag. Fixes #1519.
Update history to reflect merge of #1525
fix test muting to work for Ruby > 1.9
Upgrade to Liquid 2.5.2