Update README.md
update pom
fix use of deprecated func
clarify meter namings
builder + metrics config
tests for metrics expansion
Merge pull request #1 from webedx-spark/metric-expansions

Metric expansions
make Builder static
Merge pull request #2 from webedx-spark/metric-expansions

make Builder static
pluggable metricsName formatter
Merge pull request #3 from webedx-spark/pluggable-name-format

pluggable metricsName formatter
updating pom
add maven deploy plugin
add source and javadoc bundling
stop sanitizing tags

API docs seem to indicate this should not be necessary. And the current
sanitizer is overly strict
update pom and test
oops missed one more test
fix typo
trim down jvm stats
bump pom