* Change project URL from robbyrussell to ohmyzsh org * Update git remote to use ohmyzsh org repository
* use https everywhere * use https links on the files that are left Also, removed some broken links and updated redirections.
Updates OMZ's copy to commit 2c295432175990c1bb4e90bc13f609daa67a25d6 from zsh-users/zsh-history-substring-search