Implement unbounded search for isearch module (re #256)
Bind `g*` and `g#` to unbounded symbol search commands (fix #256)
Make test of register / work with isearch module

The test now checks both search modules. For isearch is it important
to use [return] in the key sequence to start the search, otherwise \n
is considered part of the search pattern.
Make `evil-ret` go to the first non blank on the next line (fix #257)
Merge stable-1.0