[Exist-open] Release Label for 1.0RC1

[Alex M. <al...@mi...>]

I created a release label so we have a stable source copy from the
trunk for the 1.0 RC1 release.

https://svn.sourceforge.net/svnroot/exist/releases/eXist-1.0-rc1

If it turns out we don't like the 'releases' sibling directory of
'trunk', we can just move the copy (label) somewhere else (e.g. 'tags').


--Alex Milowski