Modified the description for the property 'prefix'.
fixing refression from 0.5.5 where the url used by the metas was not coming from RS, which breakes shaker.
add ability to pass in app path for sd app deployed to  manhattan
Added example for using HB helpers.
Made some edits.
Made changes based on Caridy's feedback.
Merge pull request #1018 from lzhan/testnum

add ability to pass in app path for sd app deployed to  manhattan
Merge pull request #1019 from zhouyaoji/docs_hb_helpers

[doc] Created documentation how to use and create Handlebars helpers. The documentation also includes an example and overview of the Helpers addon.
fixes for API documentation
Merge pull request #1021 from drewfish/docs-api

fixes for API documentation
new approach to tracking changes
Merge pull request #1022 from drewfish/history

new approach to tracking changes
Merge pull request #1016 from caridy/shaker-fix

fixing regression in mojito@0.5.5 that breaks shaker.
fix issue 812:  only walk the first/shallowest version of each package
Merge pull request #1023 from drewfish/dupe-libs

fix issue 812:  only walk the first/shallowest version of each package
forgot to update history with fix for issue 812
Merge pull request #1024 from drewfish/dupe-libs

forgot to update history with fix for issue 812
adding history comments for shaker fix
Merge pull request #1027 from caridy/shaker-fix

adding history comments for shaker fix
Merge branch 'develop' of github.com:yahoo/mojito into node-10