add chpl_ prefix to other iters/functions and swap order of iters
add chpl_ prefix to other iters/functions and swap order of iters

put the chpl_direct_range_iter's first so you can read it top down, and change
the actual _direct_range_iters to be prefixed with chpl_ as well as the range
overflow checking function

chizarlicious/chapel,chizarlicious/chapel,CoryMcCartan/chapel,chizarlicious/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,chizarlicious/chapel,hildeth/chapel,hildeth/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,hildeth/chapel,hildeth/chapel,hildeth/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,chizarlicious/chapel