(org-link-search): Avoid self-matching of links, allow

(org-link-search): Avoid self-matching of links, allow
	target text to be distributed over several lines.
	(org-search-not-link): New function.
	(org-set-regexps-and-options, org-get-current-options): New
	startup options.
	(org-export-as-html): Take odd-level setting from local variable.
	(org-fontify-emphasized-text): New option.
	(org-set-font-lock-defaults): Include emphasized text.
	(org-follow-mhe-link): Allow folder-only links, fix folder name.
	(org-font-lock): Customize group renamed from `org-faces'.