Front page tweaks

[glenl]

From user Mark Van den Borre,

• On the front page, I would drop the words "browse (by)" aboven the columns ("browse latest additons"->"latest additions", "browse by instrument"->"instrument", "browse collections"-> "collections"). This saves some prime screen real estate, while still being perfectly clear.
• Still on the front page, I would make the column title ("Latest additions", "Instrument", ...) a clickable link and drop the "Show all" link at the bottom. It's no use there anyway, as it drops off most screens...
• The links currently exposed by "show all" at the bottom of the front page: I would not point them all at one page crowded with multiple tables, but at a separate page per subject (a "by instrument" page for example). When one wants to browse all instrument links, no use pointing the user to a page with tables for composer, instrument and style. Just a link to a page with "by instrument" should be much clearer and get rid of some more tables.

The first bullet was pushed in without discussion but I agree with Mark that it reads better.

The second bullet proposes column headers be clickable links. This was easy enough to add but the CSS wasn't modified to display them as links. Opinions are always welcome here.

The third bullet is covered in issue #74 .

[PaulMorris]

First and second bullets sound good to me, except on the second one I wouldn't drop the "Show All" links at the bottom, because:

1. at worst they do no harm,
2. they do help as it may not be clear that the headings are links (and aesthetically we may not want to have to make them look like links),
3. they will also help on a small mobile screen where you won't want to have to scroll back up,
4. people do scroll so the point that they are not visible without scrolling seems moot to me.

(I would suggest renaming them to "Browse all" -- see my comment on issue #74)