Fix for error thrown when using int/int format cron#23

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kierandoonan wants to merge 4 commits intosiebertm:masterfrom kierandoonan:master

+11-6

Commits on Jan 11, 2016

added spec that fails when using int/int step format for cron
Kieran Doonan
committed
Updated parse_element to work with int/int format
Kieran Doonan
committed
updated version
Kieran Doonan
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Commits on Feb 29, 2016

added specs to cover new behaviours in #next
Kieran Doonan
committed