Style cleanups

underscore > camel
dataset is one word, and so gets a lowercase S
added spaces to the unions without them so that they all match
Fix inconsistencies in read group camels

read group is (sadly :( ) 2 words, so gets an uppercase G
Fix read group camels
Update comments to /** */ style
Merge remote-tracking branch 'upstream/master' into style

Conflicts:
	src/main/resources/avro/readmethods.avdl
Merge branch 'style' of https://github.com/cassiedoll/schemas into style
Merge pull request #72 from cassiedoll/style

reads.avdl style cleanups