Implement env.exit and env.abort#244

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rossberg merged 5 commits intomasterfrom

Feb 23, 2016

Commits on Feb 17, 2016

Implement env.exit and env.abort
rossberg
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Commits on Feb 18, 2016

Make import environment more customisable
rossberg
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Commits on Feb 19, 2016

Clarify dirs in readme
rossberg
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Commits on Feb 22, 2016

Comments describing import modules
rossberg
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Commits on Feb 23, 2016

Tweak comment
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