broadcast 0.1.6.1

Replaced all uses of abs()/fabs() with std::abs() in the internal source code.

broadcast 0.1.6

Bug fix: There was a bug in acast(), where it would, under certain circumstances, incorrectly specify dimnames to the output, leading to an error. This is now fixed.
Small speed improvement for nearly all operations.
The acast() method now allows unequal groups even when x is of type raw.
Added the cast_shallow2atomic() casting method.
The cast_hier2dim() method can now set dimnames automatically by specifying the new direction.names argument.
Added the bc_strrep() method.
Added the vector2array() and undim() helper functions.
Added bcr as short-hand for broadcaster.
Added mbroadcasters().
If one of the input arrays in bind_array() is a broadcaster, then the result will also be a broadcaster.
Added more tests.