Maven versioning issues

[Dave Murray-Rust <d.murray-rust AT ed.ac.uk>]

Hi graphstreamers,

The library is great, loving it.

Just writing to point out an issue deploying my code. I was using version 
1.2, but when I installed on a friends machine, it turns out that the gs-core 
and/or gs-ui packages are referencing the gs-algo 1.3-SNAPSHOT package, which 
is not currently available from the repo.

The fix seemed to be to upgrade to 1.3, but the API has changed as packages 
have been moved around, so we had to do some code changes to get things 
running.

I guess the real issue is that a) the 1.2 packages depended on 1.3-SNAPSHOT, 
and b) that 1.3-SNAPSHOT has disappeared.

Just letting you know.

Thanks!
dave
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