put guac on the latest stable ADAM release

running off of -SNAPSHOT releases means code can change under us
during development, and also that there are not source jars in
maven.
delay mdtag parsing
remove adam snapshot dependent mdtag change
Merge pull request #132 from hammerlab/un-snapshot

put guac on the latest stable ADAM release
abstract out sliding window for any genomically mapped object
renaming read to region where applicable
fix test expected error message
new snv caller
adding caller to main list
filtering out deletion alternate base for now
Merge pull request #138 from hammerlab/avoid-md

Delay MDTag parsing
more updates of comments and variable names from read to region
update for ADAM 0.11
change reference region to hasreferenceregion
Merge pull request #139 from hammerlab/slidingwindow

Generalize SlidingReadWindow to SlidingWindow over regions
Merge pull request #134 from hammerlab/simple-snv

Somatic SNV caller using base and alignment qualities
prototype of structural variant caller
init pass over breakpoints