Installation updates

The teamadvance repo's installation doesn't work without some hacks that have to be assembled from various issue tickets and mailing list posts. The "Manual Installation" procedure that I've created *does* work, along with its modified zips (whose contents are completely accounted for in the source, and were built with the origininal build.xml).

***NB:*** If the pull request is accepted, you'll need to change the URL of the zip listed in the instructions, according to https://github.com/teamcfadvance/cfspreadsheet-railo/pull/65/files#diff-04c6e90faac2675aa89e2176d2eec7d8R31 .
This URL will change to teamadvance, if the pull request is accepted.