Android touch support

[wasper1]

Issue #527
The aim of this PR is to extend chart to support Android touch devices.
I've tested this on:
Android 4.4.2
Android 4.0.3

[wasper1]

Please trigger CI again or change some configuration cause e2e tests failed on webdriver Error: ECONNREFUSED connect ECONNREFUSED

[lorem--ipsum]

Hi, thanks for the PR. Unfortunately I've been working on a big update (switching to TS2 and a different modules manager, mainly) and your PR will probably have to be updated. I'll help you through this if you want, though.

[chaosmail]

Thanks for the great contribution! I think this feature could be great for v2 as well. I fixed a couple of things, especially these bugs with travis in the latest PR, and merged the changes in your branch. I would not mind porting it to the new latest dev version, but maybe @wasper1 can help us out on this!

[chaosmail]

Nice travis is passing now! However, we should definitly have some e2e test on this feature.

[chaosmail]

Resolves #535

[chaosmail]

I moved the branch to feat/android-touch for now, so I can rebase on master and add some tests