#2 Indentation fix and an autoload

[Ville Skyttä]

With this patch, xslide will not confuse indentation
when it meets constructs like

<xsl:output /> (note the space before />)

and

<xsl:foobar
foo="bar"
baz="doh"
/>

Also, it adds an "autoload cookie" which registers
*.xsl and *.fo with xslide when used in the (X)Emacs
packaging system.

[Ville Skyttä]

Indentation and autoload patch