use getattr
record.FILTER is now always a list
format empty filter lists
Write record without crashing on missing GT
Add missing test case to test suite
Test writer on bcftools output
Merge pull request #72 from martijnvermaat/missing-gt

Write record without crashing on missing GT
Skip lines with only whitespace
Strip whitespace only once
Merge pull request #73 from martijnvermaat/ignore-empty-lines

Ignore empty lines
Allow vcf_melt to process format fields that are missing in some records
Fixed bug in walk_together when one or more VCFs have no records
Merge pull request #76 from seandavi/master

vcf_melt script now deals with missing format fields
apply 0.6.0 release which seemed to get commited off of a branch
Changed the rule to split records into columns

According to the specification the columns must be tab separated. I encountered an VCF file from NCBI that has spaces in the INFO column, which caused PyVCF to fail.
http://www.1000genomes.org/wiki/Analysis/Variant%20Call%20Format/vcf-variant-call-format-version-41
add strict whitespace option to allow for well formed VCFs with spaces in sample names.
0.6.1 release
Allow flexibility in parsing INFO values specified as integers in the header: also allow float values.
Merge pull request #79 from chapmanb/master

Allow flexibility in parsing INFO values specified as integers in the header: also allow float values
Fixes #78