v0.3.1

Update doco

v0.3.0

Add missing error handling (#17)

Add extra sanity

Now we make an attempt to properly parse the arguments before evaluating them. Only a few more PRs till I reinvent LISP.

Also adds '-o' and '-d' flags, and slightly changes the behaviour with multiple lists having the same key (now last one wins, rather than all appending).

v0.1.2

Add release to travis