syntaxhighlighter 6.x-1.18

New features added in the last few releases:

- Add settings field for disable the Syntaxhighlighter on selected pages in case of compatibility problem. IMCE is one such case

- Add settings field for site wide Syntaxhighlighter javascript default expression.

- Add patch #531318: Fix and improve syntaxhighlighter filter tips.

- Syntaxhighlighter js lib can be placed inside in any of the following directories and can be nested inside subdirectory of any name (except 'src'):

-- sites/all/libraries
-- site-file-directory-path (usually sites/DOMAIN-NAME/files)
-- syntaxhighlighter module directory

This should ease module upgrade. The javascript lib can be placed elsewhere and the module directory can simply be replaced on upgrade.

- fix a bug with fresh install introduced in 1.17