Improving bob & livePreview. See commit details.

* controllers/_database.php : Ordered the contents fetched by
creation_date ASC and re-formatted few lines in login().
* views/admin.contents.php : Just added class="large" to the body
textarea.
* views/css* : Adapted the css to the addded classes: article.single and
textarea.large.
* views/js/main.js : Still fixing and improving the bob() and
livePreview() functions.
* views/view.base.php : Added a quick note regarding bob().
* views/view.content.php : Show "Edit Content" only if isAdmin() and
added class="single" to article.
* views/view.index.php : Moved "Read More" on left and added Time of
content creation.

Notes:
See comments in main.js and views/view.base.php for info regarding bob()
and livePreview().