Meaningful Changes

Start supporting compilation with Closure Compiler in 'ADVANCED' mode
Allow setProperties to set readOnly properties
- this.setProperties({readOnlyProp: value}, true)
Prevent properties from reverting to default value after boot when the property has no observers

Raw Notes

[ci skip] Fix API docs (commit)
Guard against overwriting bound values with hasOwnProperty. Fixes #4540 (commit)
[ci skip] reduce warnings (commit)
fix globals for goog.reflect.objectProperty -> JSCompiler_renameProperty swap (commit)
[ci skip] remove outdated externs file (commit)
lint and compile successfully (commit)
update dependencies (commit)
Rename setPrivate -> setReadOnly (commit)
Add setPrivate arg to setProperties (commit)
Never accidental test change (commit)
Remove unused @method (commit)
Standardize @return, @param, type case. (commit)
Fix jsdoc warnings. (commit)
jsdoc fixes. (commit)
Fix jsdoc issues. (commit)
Fix jsdoc issues. (commit)
Enable error on jsdoc mistake. (commit)
fix @license comments & shadycss imports. Remove custom style from externs (commit)
closure advanced compilation (commit)