gaspi_run does not properly quote file name arguments

[sloede]

Due to

GPI-2/bin/gaspi_run

Line 155 in ba63191

if [ -r $1 ]; then

and many other places where input is used without quotation, it is not possible to provide command line arguments with non-standard characters in them. For example,

gaspi_run -m "machine file" $(which hostname)

will fail with something like

/home/mschlott/hackathon/GPI-2/GPI-2/bin/gaspi_run: 155: [: machine: unexpected operator

Error: Cannot read machine file (-m option) (or file does not exist)

I believe this can be avoided comparably easily by properly quoting all command line arguments, e.g.,

    if [ -r "$1" ]; then