added simple wrapper and group creation ability

fixed variables in strings
added a wrapper class to allow simpler basic usage (mainly for hiera)
added additional parameter to create the primary group for pool accounts
added pool groups to simple, reversed some changes

added pool accounts to the simple wrapper
fixed more style issues
simplified pool accounts method
bug fixes

added test if pool group accounts are not used
fixed dependency issue when removing pool group accounts and pool users
added documentation
added simple grid/group mapfiles support

added define and class to create grid-mapfiles and groupmapfiles
added support for the grid/group mapfiles to the simple wrapper
added voms-grid-mapfile, removed debug messages