fix rmdir cache issue

add UpRemove test

use original password for dedicated pam api

add config structs json/yaml conversion support

do not set default auth file path when creating a new config struct

Add fix auth info

Merge pull request #48 from cyverse/upload_rework

do not truncate, but remove before upload to overwrite

new xml is used in >= 4.2.9

Rework message request and response

do not retrieve collection to stat a file