Fix markup conflict in builtin RegExp class docs.

The "|" is used as table cell separator and inside a table cell
needs to be escaped with HTML entity.
Add :touch2 --import testing code to Rakefile.

In commented out form, to be used when needed.
Ignore hidden members when counting new ones.

The Class#find_members(:local=>true) previously also returned
the hidden members.  This resulted from the fact that internally
it was using #global_by_id and #local_by_id indexes from MembersIndex
class.  As these maps are also used internally inside MembersIndex
I'm now exposing #all_global and #all_local methods which return
the arrays instead of hashes and both without any hidden members.
Merge branch 'master' into doc-tags