Added generic_{integer,float,string,boolean}_info_field methods.
Updated test_variants.vcf with new info annotations.
More use of auto, using iterator constructor, and template function for int32_t / float generic_info_field.
Fixed typo to use free instead of delete on malloc memory.
Merge pull request #82 from broadinstitute/ks_info_field

Added generic_{integer,float,string,boolean}_info_field methods.