Plugin to use Joshua Eichorn's "Easy" web thumbnail service to autocreate thumb images for entries in LDM.

1) You need an account, which is free for less than 250 webthumbs a month, and very cheap for more than that.
   See http://bluga.net/webthumb/.

2) Use the vb admincp to install easywebthumbs-plugin.xml in the usual way.

3) Visit LDM admin/settings page.  You will find a new section of settings for webthumbs.

- Update webthumb_key to the (long) hex character sequence for your account.
- Update webthumb_uid to the userid for your account.

The plugin will attempt to use the easy web thumbnail service to generate an image of a site
each time you add/edit an entry in LDM when:
a) the image field on the add/edit entry form is left blank;
b) the url points to a fully-qualified web address which does not have a recognised mimetype;
c) the web address validates correctly;
d) LDM admin setting *link_imagesize* is set to a value greater than non-zero

This can take between a few seconds and a minute to complete.  Unlike the alternative webthumb plugin,
no local copy is kept of the image - the plugin either gets a new thumb or retrieves a cached
image from the webthumb server.  This makes the code more robust but somewhat slower on subsequent
page displays.

Tested: 27/4/2009

