Merge pull request #49 from jonathangreen/1.x

Updated README
Support for UUIDs in Tuque.
UUID in constructObject tests
namespaces in constructObject tests
Facilitate datastream copying.

Wrap existing datastream, so a copy is created if someone tries to change
it.
Flesh out comments.
getNextIdentifier test
getNextIdentifier supplying many ids if asked
Throw a more descriptive error about malformed XML.
Add property comparison to datastream copy tests.

... Also, flesh out comments.
Merge pull request #51 from adam-vessey/1.x

Facilitate datastream copying.
Merge pull request #50 from willtp87/1.x

Support for UUIDs in Tuque.
Change the exception text a bit.
Merge pull request #52 from jordandukart/1.x

Throw a more descriptive error about malformed XML.
Test that the relationships are NOT picked up when copying.

Good to know one way or the other.
Undo breaking of references.

Was an oversight on my part.
Add tests to explicitly test the mutation of datastreams on ingest.
Merge pull request #53 from adam-vessey/1.x

Test that the relationships are NOT picked up when copying.
Fix to not continiously create file pointers.
Merge pull request #54 from jordandukart/1.x

Fix to not continuously create file pointers.
Made travis not run against php 5.5 for now