Fix broadcasting for non-DefaultArrayStyle containers

[odow]

Closes #221

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.47% 🎉

Comparison is base (42930a3) 89.04% compared to head (f90d253) 89.51%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #222      +/-   ##
==========================================
+ Coverage   89.04%   89.51%   +0.47%     
==========================================
  Files          23       23              
  Lines        2136     2137       +1     
==========================================
+ Hits         1902     1913      +11     
+ Misses        234      224      -10     

Files Changed	Coverage Δ
src/broadcast.jl	81.96% <100.00%> (+0.30%)	⬆️

... and 2 files with indirect coverage changes

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