Changing View for Home; Adding Posts View

Now ignoring test* and pages/test.php

Created an Excerpt object, using it in get_excertps() function (in
functions.php), which grabs 5 excerpts from the DB, creates Excerpts out
of them and prints them (formatted to HTML).

Home.php no longer calles get_blog_posts() for content, but now calls
get_excerpts().

pages/posts.php was crated, and automattically added to the navigation.
By default posts.php calls get_blog_posts() - which gets and prints the
last 5 blog posts - or if $_GET is properly set it will show a specified
(by id in $_GET) blog post.