Restricted view of exercises to current user.

The exercises controller was returning all exercises for the
index action. Modified it to return only those from the currently
logged in user.
Made jQuery-UI work a little.

Have a couple of sample widgets included in Exercises index page;
a button and a datepicker. They work and serve as examples for
now. Also, have some style items from the default theme. Note
that ordinary tables and lists do not seem to be styled. My
css style on the main <ul> in the index page is being used.
Added jQuery UI theme stylesheet hosted at Google APIs

Put a link to a jQuery theme stylesheet in the application.html.erb
file so that every page would have the default theme available.
These themes are hosted by Google. It is simpler to use theirs and
they probably will load more quickly than if coming from our own
host.
Added some jQuery-UI theme features. Not finished.

Wanted to use jQuery-UI to allow various themes that eventually
the user would be allowd to change. Ran into trouble in that ordinary
text fields are not styled! I can't believe it. Besides text fields, a
couple of other simple fields are not styled either. I left it with
the default 'smoothness' theme connected via the applicaton.html.erb
file.
Merge branch 'master' of https://github.com/gsargent/ikonshow_app

Conflicts:
	Gemfile
	Gemfile.lock