use default MODEL unless explicitly specified
fixed lexical ordering of std.algorithm doc index (endsWith, nextPermutation, nextEvenPermutation)  and cheat sheet
added any and all to function index and to the cheat sheet
Merge pull request #1320 from stschiff/docfix

Small fixes to std.algorithm documentation
Merge pull request #1258 from dawgfoto/defaultMODEL

use default MODEL unless explicitly specified