Snowman v1.0.1 (beta)

Changes in this patch:

• Bugfixes in aag and aal (slice greater than / less than) when there are not as many resulting elements as expected.
• Bugfix in ag (array groups-of) with negative or 0 parameter.
• Bugfix in ar (repeat array) with negative parameter.
• Bugfix in nb (to-base) with negative or zero base.
• Bugfix in af (fold) when folding over empty array.
• Bugfix in aa (array element access) when accessing element out of bounds.
• Bugfixes with invalid regexen.
• Internal improvements with copy constructor for Variable.
• Fixed a ton of memory leaks.