added gradle build info to readme
filter to annotate Mendelian violations (incomplete)
refactor trio handling to VCFUtils so it can be used by
CompoundMutationFilter as well. Still a lot of FIXMEs to the code...
Fixes to MendelianConstraintFilter (was using iterator before initializing)

In the process, I added Guava's AbstractPeekableIterator
updates to 1000genomes, dbNSFP, ESP6500 references
reestablish config.js as a symlink
organizing imports
consolidate code to auto-gunzip based on file extension
allow mendeliancontstraintfilter to use GL instead of PL
XLifyVcf can apply biallelic, mendelian filter by command line
update default make targets for default download; rename to ESP6500SI
URLEncode info values internally and optionally when writing (to allow for things like spaces and commas)
default filter needed changing for new VCFVariant API (the perils of dynamic typing...)
fixed silly error preventing using XLifyVcf from stdin
DelimitedString class for optimization around String.split
more useful for debugging to have stack trace
off-by-one error (did not notice until I tried this with some vcf references)
move some more initialization to initialize()
fix order in initialize()
print stack trace with exception