Merge pull request #2 from maxheld83/master

fix misleading no-int error message
add os x system file to gitignore
Merge remote-tracking branch 'upstream/master'

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Merge branch 'master' into dev-max

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add to gitignore
add import for feedback, sample, sorts as per https://github.com/aiorazabala/qmethod/issues/5, https://github.com/aiorazabala/qmethod/issues/9, https://github.com/aiorazabala/qmethod/issues/10