Update to 0.5.0

This release incorporates the following changes:
    - Duplication genotyping model has been adjusted. The new model is
      more sensitive and should better reflect genotyping uncertainty.
    - Genotype quality calculations have been improved.

If you have filtering scripts relying on genotype quality (and/or
site quality for DUPs) you may need to recalibrate them before applying
to this version.

svtyper/version.py

@@ -1,2 +1,2 @@
 __author__ = "Colby Chiang (colbychiang@wustl.edu)"
-__version__ = "v0.4.0"
+__version__ = "v0.5.0"