Improve std.algorithm.find and std.algorithm.splitter for (d)char needle
Merge pull request #1221 from Kozzi11/find_splitter

Improve std.algorithm.find and std.algorithm.splitter for (d)char needle
Improve std.algorithm.splitter popBack
Merge pull request #1476 from Kozzi11/find_splitter2

Improve std.algorithm.splitter popBack