[core] added real version printout

Fixes #320

Updated top level README for YCSB 0.7.0 release

[couchbase] nit fix in Couchbase README

[orientdb] fixed scan with readallfields

[accumulo] don't run Accumulo tests on windows build.

The Accumulo tests don't properly initialize their mini cluster on windows,
so skip the tests entirely in that environment.

closes #617

Revert "[accumulo] don't run Accumulo tests on windows build."

[accumulo] don't run Accumulo tests on windows build.

The Accumulo tests don't properly initialize their mini cluster on windows,
so skip the tests entirely in that environment.

closes #617

[client] Added basic command line argument error messages to Client.java

Orientdb scan fix

[docs] Update link to old Yahoo! page due to site redesign.

[hbase10] Turn off info servers during tests

[geode] Add Geode driver

Conflicts:
	bin/ycsb
        geode/src/main/java/com/yahoo/ycsb/db/GeodeClient.java
	pom.xml

[orientdb] put db conn stuff in sync method

All db connection and creation logic is the same, it is just pulled into
a synchronized method so that multiple threads run through the
connection process one at a time.

Fixes #571

[solr] tune down log output during tests.

Couchbase checkstyle

Also removed some unnecessary comments

Closes #480

This removes the need for the private Couchbase repository since the
1.4.10 criver is available in Maven Central.

[couchbase] implemented scan for couchbase

Adapted from #172