Added goto-char point-min when issues list is finished loading

Also removed unnecessary with-current-buffer statement which was
enclosing the rendering code and preventing goto-char from persisting
Add ability to view issue details in issue view mode

This change required some restructuring so that all the issue data is
stored in the text attributes of each row in the issues list.  Also
redid keybinding to support magit style n/p with "other window"
displaying issue details.
Remove unnecessary save-excursion from issues list defun
Do not default to login repo
Add gissues alias for issues list