Use File#read instead of #readlines.join construct
Revert to #readlines#join, but enclose it in a function

This is necessary to preserve the handling
of \r\n and \n line endings.
Fix 1.2.0 release post title
a patch for the issue: [Liquid doesn't render my partial · Issue #1519 · mojombo/jekyll](https://github.com/mojombo/jekyll/issues/1519)
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
Merge pull request #1516 from penibelst/fix-post-title

Fix 1.2.0 release post title
Update history to reflect merge of #1516
Update CONTRIBUTING docs for better PRs.
Merge pull request #1531 from maul-esel/mute-tests

mute LSI output in tests
Update history to reflect merge of #1531
Merge pull request #1536 from mojombo/liquid-2.5.2

Upgrade to Liquid >= 2.5.2, < 2.6
Update history to reflect merge of #1536
Print better messages for detached server. Mute output on detach.
Cleanup newlines in Commands::Serve