Changed random number generator to crypto:rand_uniform(), so that the uuids are not always the same sequence. I guess that is the idea of a uuid?
Do not import random.

As part of R16, support for packages has been removed. It seems to me that the `import` attribute, in the context of `uuid.erl` is of very little help. Therefore, I'm deleting it, so that it is possible to compile the module under R16. 
Merge pull request #4 from shoehn/master

A really random source for the uuids
Merge pull request #6 from robertoaloi/patch-1

Do not import random.
merged changes