Fix more fuse client concurrency bugs; add some standalone test cases for fuse client

git-svn-id: svn://irodssvn.ucsd.edu/trunk@5406 ea137bd6-aa86-47b6-b90d-b101d9f19a90
remove unused test script

git-svn-id: svn://irodssvn.ucsd.edu/trunk@5407 ea137bd6-aa86-47b6-b90d-b101d9f19a90
add readme file

git-svn-id: svn://irodssvn.ucsd.edu/trunk@5408 ea137bd6-aa86-47b6-b90d-b101d9f19a90