Update CHANGELOG.md
style(progressCircular): prefix variable names
fix(checkbox): expands the checkbox click radius

Closes #379.
docs(): add two frame delay to highlight code render
fix(checkbox): fixes issue where double-clicking checkboxes causes text selection

Closes #588
docs(guides): fix minor errors and typos
docs(): fix demo-toolbar button color
update(docs): jsdocs for radioGroup

Close #787.
enhance(ripple): adds support for $mdThemingProvider

Closes #748
update(docs): jsdocs for md-text-float

Close #762.
update(docs): rename tab buttons in Source View

Close #827.
update(text-float): updates API docs):

Refs #827.
update(interimElement): enhance jsDocs, hide() and cancel() returns promise
feat(layout): add both layout-margin and layout-padding attributes

Closes #830
style(): make z-indexes for components more sparse

Closes #798.
fix(tooltip): make it appear above dialogs

Closes #735
fix(layout): make [hide] attr work properly with all device sizes
feat(toast): simple with content string: '$mdToast.simple('my-content')`

Closes #833.
amend(interimElement): add onRemove to exposed methods

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fix(compiler): trim whitespace from templates (effects toast, bottomSheet, etc)