#255 Forbidden robot indexing

[Coolius]

Linpha is indexed by default by search engine. An option is missing to avoid automatically undesired indexing, e.g. by goolge.

Proposal:
Add new configuration to avoid this

Workaround:
Add manually in header.php file the following lines:
<meta name="robots" content="noarchive">
<meta name="robots" content="noindex">
at the end of the </HEAD> section.

Solution:
Add this automatically if configuration is set to not index.
Also a robot.txt file would be helpful to avoid indexing images.