HOME_EPICS_APPS without  ../

When the user how had installed EPICS has his $HOME not pubic-read,
the path /home/user/../epics can not be resolved.
Solution:
Replace "/home/user/../epics" with "/home/epics". After doing that,
show the new path to the user, and ask if EPICS should be installed.

Create /usr/local when needed:
Some systems (like Mac OS X) do not have the directory /usr/local/,
so create it when missing.