Ignore SIGPIPE in the main body of the dx function dispatcher
Ignore SIGPIPE in err_exit()
Merge pull request #47 from dnanexus/PTFM-9757-ignore-SIGPIPE

Ignore SIGPIPE in the main body of the dx function dispatcher
Set Java source encoding explicitly.

This fixes the following warning when building:

  [WARNING] Using platform encoding (UTF-8 actually) to copy filtered
  resources, i.e. build is platform dependent!
Add DXJSON.ArrayBuilder (helper for making JSON arrays).
Changelog and dxR version update for v0.73.0
Add missing Guava dependency.
Changelog and dxR version update for v0.73.1
Actually supply Changelog update; v0.73.2
Windows compatibility for Python syntax checks.
Changelog and dxR version update for v0.73.3