Limitations because of preview status (see #960):
- does not yet use ShadowDOM
- does not use a builtin conditional like `if`
- uses a temporary bower repository
Closes#943
- use performance log of chromedriver / appium to get timeline data
for calculating metrics for benchmarks
- change all benchmarks to be made of a standalone application
and a protractor test that collectes timeline data
- fix and simplify benchmarks
- add dart2js to build
- remove benchpress
Closes#330