Create generified primitive serializers, and test them, for all avro primitive types.
Static schema registries need synchronization (yay for parallel test execution!)
Get rid of old multiple primitive avro serializers in favor of combined one.
Get rid of specialized string array serializer, the primitive array serializer handles it.
We may want this back at some point to avoid overuse of the more-opaque-than-string Utf8, but we can decide that as an independent matter, when all is clean.
Partial, unworking checkin so I can switch computers
Working generic array of pair serializers
Get rid of demo-specific avro schema from the general project.
More tests of the new generic serializers and their construction.
Move schema store from general synchronization to a read/write lock.
Merge branch 'develop' into serializer-cleanup

Conflicts:
	binning-utilities/src/test/java/com/oculusinfo/binning/io/serialization/SerializationTypeTests.java
	tile-examples/julia-demo-live/src/main/java/com/oculusinfo/julia/JuliaLiveTest.java
	tile-generation/src/test/scala/com/oculusinfo/tilegen/tiling/RDDBinnerTests.scala
Merge pull request #68 from oculusinfo/serializer-cleanup

Serializer cleanup