don't let the cp2clip div cover a nearby edit button

fix #8

valign the whole container div as is the original <pre>

For some css reasons I don't understand, the margin-top of the first child
of the <dd> element (when code is downloadable) has no effect but
t

valign the whole container div as is the original <pre>

For some css reasons I don't understand, the margin-top of the first child
of the <dd> element (when code is downloadable) has no effect but
the margin-top of the inner elements is respected. This leads to bug #6.
The solution is to use the <pre> margin-top for the container and to
set the margin-top of the pre elem to 0.

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nicify code

make button visible only on hover on desktop browser

prevent button from scrolling with <pre> content

add one ';' so that DW js minifier does not choke

put CRLF lines in win clipboard to work around PS bug

use CECILL 2.1 license

supprime les messages de débugage

prends en compte les pre avec numéros de ligne

supprime les NBSP ajoutés par geshi sur les lignes vides

add semicolons so DW can minify JS without errors

premiere version fonctionnelle