Add posix compatibility to distribution.

[accumulo] README.md for the Accumulo Binding.

[cassandra] Checkstyle updates for the Cassandra bindings (cassandra …

[aerospike] Checkstyle updates for Aerospike.

[accumulo] Checkstyle cleanup and enforcement for the Accumulo binding.

* Added a package-info.java.
* Added JavaDoc for the binding's DB implementation.

Again, a lot of whitespace changes and the normal checkstyle type errors.

2 items of note:

1. Deprecated QueueElement since it is not used.
2. Moved some of the exception handling to common locations to remove
   empty catch blocks.

[jdbc] added a README

Fixes #459

Adds a Cassandra 2 CQL binding.

[git] added standard intellij omissions to .gitignore

Add Kudu bindings

Fixes #451

Rename README file to README.md file for database bindings.

Rename README file to README.md file for the following DB bindings so the build process can generate binding specific tar balls for them. (currently they are broken because the build process looks for README.md)

dynamodb
hypertable
mapkeeper
nosqldb

[core] added configurable percentile values

Fixed #336. Classpath handling BasicDB from source

[docs] Update README for 0.4.0 release.

Closes #409

Currently doesn't include unit tests since we don't have mock objects for that.

In OneMeasurementHdrHistogram, now reading hdrhistogram.percentiles
from workload configuration. This property is a comma delimited string
of Integers to use as percentile values.

This implements #437

[licensing] Added ASLv2 headers to files without them for v0.4.0. Removed old copy of Javadoc.

Fix 90th percentile reported as 95th

Fixes #438