perf(compiler): An option to disable the ElementProbe.

Closes #1118
Closes #1131
fix(dccd): fix false positive for collection moves

Closes #1105
feat(benchmark): add automatic gc before each test

Also included is a script to launch Chrome Canary with the appropriate flag to
enable manual garbage collection.

Closes #1133
docs(developer): fix typo in developer.md

Changed instance of "xhange" to "change"
perf(compiler): +6% Pre-compute ViewFactories, styles for components.

This sped up the TreeComponent benchmark by 6%.

Closes #1134
benchmark(TreeComponent): Update for watchAST and disable ElementProbe.
refactor(Scope): Use scope.watchAST instead of scope.watch across
angular.