remove set -e, some tests were causing the script to exit silently, upda...

Minor updates, and removing set -e. The script was exiting silently when testing for existence of files/commands.
Possibly due to shellshock. ;) 

After a restart the limits look somewhat low.
```
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
file size               (blocks, -f) unlimited
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 2560
pipe size            (512 bytes, -p) 1
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 709
virtual memory          (kbytes, -v) unlimited
```