clean up dead code in client.

* set .gitignore to standard eclipse
* update versions of Accumulo to 1.4.4
* Pin slf4j binding to 1.5.8

Accumulo, Thrift, and YCSB all use different versions of slf4j, causing
runtime issues because everything is bundled together. Pin the version
to something in the middle that seems to work, even if it's not the
latest and greatest version.

Based on YCSB++

http://www.pdl.cmu.edu/ycsb++/

This patch comments out the gemfire plugin from the pom.xml as the
build fails with the following message:

[ERROR] Failed to execute goal on project gemfire-binding: Could not
resolve dependencies for project com.yahoo.ycsb:gemfire-binding:jar:0.1.4:
Failure to find com.gemstone.gemfire:gemfire:jar:6.6 in
http://dist.gemstone.com.s3.amazonaws.com/maven/release/ was cached in
the local repository, resolution will not be reattempted until the
update interval of gemstone has elapsed or updates are forced -> [Help 1]