Regression test for #2980
Fix Angle.to_string to get it to output string arrays
Clarify the Angle.to_string docs return type for arrays
update changelog
Work-around for broken numoy 1.5 unicode char# count
Fixes from @mdboom and (hopefully) fix failing test
One more try at getting it to work for numpy 1.5
Merge pull request #2981 from eteq/angles-to_string-array-fix

Angles.to_string fix to get string outputs