Add sample (very simple) theme
Add partials instead of  layout
Add preview link
[WIP] creating previewing
Revert "Add partials instead of  layout"

This reverts commit 441f3de6967a0c51e3a5d193eeb1be791fd86e36.
Use hash
Implement Page#render
Merge pull request #4 from satococoa/sample-theme

こんな風にテーマは作る