allow hyphens in page and site urls
changed comments on url field to suggest use of hyphens
Fixed a bug where the script would create new symlinks in the wrong place if they already existed.
Update install.sh

changed -T to -n which should do the same thing but works in various implementations of ln
added support for suggested limits in disco input limited plugin and implemented it for the page content manager
Generalized the sitemap page type
added documentation of _meta note option for page types