Descriptive page explaining annotation sources

[greatfireball]

Requested by @fbemm in #34 :

Laura DeMare from Genome Research requested to include the alias (synonym) and the description of unigenes/isogorms to be indexed and searchable. Would be great if we can get this done. Would make things easier for people that search for their favorite gene. In parallel we should add a descriptive page to TBro that explains what annotation comes from where and how reliable it is.

This issue should cover the second request:
In parallel we should add a descriptive page to TBro that explains what annotation comes from where and how reliable it is.

[iimog]

Is a single static page required which is linked to from different locations?
This should be no problem at all. @fbemm if you provide the content I can add the page any time.