do reverse of a bytecode in lookbehinds
backtracking matcher works with reversed bytecode
ditto with Thompson matcher
cleanup to keep lookahead/lookbehind more in sync for future

Fix 64 bit issues, remove useless debug hook
fix broken indention, detab
Mark std.string.inPattern as @safe and pure
Mark std.string.countchars as @safe and pure
Merge pull request #1518 from tom-tan/safe-pure-string-inPattern

Mark std.string.inPattern as @safe and pure
Merge pull request #1519 from tom-tan/safe-pure-string-countchars

Mark std.string.countchars as @safe and pure
Make std.string.removechars @safe and pure
Make std.string.removechars @safe and pure by using implicit conversion
Add RefRange to ddoc overview.
Merge pull request #1484 from blackwhale/kill-back-eval

std.regex: First step to lookbehind in ctRegex
Merge pull request #1520 from tom-tan/safe-pure-string-removechars

Make std.string.removechars @safe and pure
lookbehind for ctRegex
Merge pull request #1522 from quickfur/issue10885

Add RefRange to ddoc overview (issue 10885)
[trivial] Remove documentation quick link to deprecated indexOf

indexOf was recently made undocumented to go along with its deprecation.  The handwritten quick index link remained though.
Merge pull request #1485 from blackwhale/ctr-lookback

Lookbehind in ctRegex
Merge pull request #1524 from eco/patch-4

[trivial] Remove documentation quick link to deprecated indexOf