attempt to merge sx and bsxfun; add new sxfun function. arrayfun/map function needed
fix typos in sxfun
implement arrayfun
sx.cpp works well but sxfun.cpp does not compile with pfo_plus
fix sxfun test
 testing all arities with sxfun
remove unnecessary bsxfun/tsxfun tests
Merge branch 'master' into merge_sx_bsxfun
fix calls to adapt_data in arrayfun, remove the reference
reduce sx and sxfun tests for faster compilation
split arrayfun.hpp into two files
Merge sx and bsxfun functions, fix #253