Added robots configuration

[dbachmann]

I know it's possible to set all robots values by xml but it's not very user-friendly. So I added the possibility to set these values in the backend for each product, fpr each cms page and for each category. I added also a configuration to set paginated category pages to NOINDEX, FOLLOW and to change the robots for non-content pages like contacs, reviews, search, etc.

[luigifab]

Is someone used/tested it?

[fballiano]

setting it to draft because of the many conflicts

[fballiano]

fixed a million conflict and rebases, it is untested

this is the original diff before the rebase (just in case) 1609.diff.txt

[fballiano]

still needs fixing work because of phpstan and phpcs...

[dbachmann]

Hello there,

I#ll check and fix this in a few days.

[sreichel]

Why to remove app/code/core/Mage/Cms/sql/cms_setup/install-1.6.0.0.php? Better update instead o changing app/code/core/Mage/Cms/sql/cms_setup/mysql4-install-0.7.0.php? Use const for (repeating) config paths?