Add 1.4.3 release post by @BenBalter for master branch.
Update History.markdown with 1.4.3 release.
Require Liquid 2.5.5 <= x < 2.6
update dat gemspec
Update history to reflect merge of #1947
Lock Maruku to 0.7.0

This fixes the errors we see in our tests due to the upgrade to Maruku
0.7.1
Update history to reflect merge of #1958
Make doc menus more reusable
Update history to reflect merge of #1953 [ci skip]
fix full path leak to source directory when using include tag
added tests for full path leak to source directory when using include tag