Proxy support and color added to server task

[simcha]

I added --proxy argument support in the configuration and also colour to the terminal. As an addition there is a dot on the server button that has a colour of last colourful message, that makes you run with panel minimised nearly all the time. The only problem is with ember --color option that is needed to make this changes work (until chalk library would accept environment variable to force colour in nodejs) is that it produces warning. However I thing it is so much more convenient with colour and colourful dot that the warning is to be tolerated for some time. Thanks for nice tool. Jan

[alexlafroscia]

Hey, since I did some updates, this commit no longer can be merged easily. If I get a chance I'll try to fix it, but if you wouldn't mind taking a look, I would really appreciate that too!