GitLab

- PSI_ variables renamed
- new modulefiles layout implemented
- autoload libmodules.tcl
- use of term 'group' instead of 'family'

- in function log(): redirect output to '1>&$fd' not '/dev/fd/$fd',
  writing to '/dev/fd/X' might run into permission problems

- set 'bindir' if not set
- '\n' removed from info() and error()
- die() always prints to stderr
- get_abspath(), append_path(), prepend_path(), remove_path() added

scripts/Bootstrap/Pmodules/libpmodules.bash: 'check_modules_env()' splitted into 'check_pmodules_env_vars()' and 'check_pmodules_directories()'