Settings

Hi Arunoda!
I implemented the meteor_settings functionality to make laika work for my project.
I hope you're ok with it, I'm not familiary with the meteor/node interaction and how laika works with that.
I set the METEOR_SETTINGS variable by parsing the settings file with the same function meteor uses.
I don't know if there's a way around the code duplication as laika runs its own nodejs process.

Also, in 3869af2 I just changed the regex to match lines that start with 'error' because it was tripping up on some benign logging with the word error in it.