add method to list subdirectories in a directory
return set instead of collection
fix bug that occured when trying to do managed logins
reference commit for envtool cli with script and CLI class

This reverts commit 6f5b244526617cc8f8ebfa20fab1f9454b06ad10.
Fix the return type of the listAllEnvironments method and add some context
to the output from the cli
call logout on exit from client
add option to useradmin CLI to list the current sessions
improved implementation for connection pools
perform cleanup even when test fails
handle corner case where the client is forced to exit due to a security change

Conflicts:
	concourse/src/main/java/org/cinchapi/concourse/Concourse.java
remove warning
place the pref handling logic before the core tanuki logic
upgrade taunki wrapper to version 3.5.26 to take advantage of OS X yosemite bug fix
upgrade native libraries and wrapper binaries for tanuki
backport changes necessary to make session listing cli action work
fix unit test compile error