history.md update
Merge pull request #1208 from lzhan/history

history.md update
release 0.7.2 (based on 0.7.1-19-ge682e74)
Added a short section on  and a code snippet.
Pulled the HB documentation from the MVC chapter and created a separate chapter.
Fixed the hiearchy of sections.
Merge pull request #1214 from zhouyaoji/docs_separate_hb_templates

[docs] Created separate chapter for Handlebars in Mojito from the documentation that was in the MVC chapter.
Merge pull request #1216 from zhouyaoji/docs_onRefreshView

[doc] Added a short section on  and a code snippet for the `onRefreshView` method called after `refreshView` is executed.