Bug 1097918 - sdk/test/assert input and output order does not match
Export `setupDisposable` and `disposeDisposable` functions so that Disposables could invoke them directly.
Update sequence lib to cover ES6 Symbols.
Merge branch 'master' into 1097918
Bug 1097918 - updating test-test-assert.js for the output changes
Merge pull request #1710 from erikvold/1097918

Bug 1097918 - sdk/test/assert input and output order does not match r=gozala
Merge pull request #1717 from Gozala/context-menu-2-disosables@1070952

Bug 1070952 - Export `setupDisposable` and `disposeDisposable` r=@erikvold
Merge pull request #1718 from Gozala/context-menu-2-sequence@1070952

Bug 1070952 - Update sequence lib to cover ES6 Symbols. r=@erikvold