Include option STRICT, which is true by default. If STRICT, throw an exception if something other than a SNP or Indel is found. Otherwise ignore that event.

git-svn-id: http://svn.code.sf.net/p/picard/code/trunk@1479 8bce386e-0d6e-43e0-b1ca-608082c0432d
Merge remote-tracking branch 'upstream'