No longer move files from lib64/ to lib/, as per the current S-Net
repos.  Add a handy automatic installation script.
Update the snetc compiler for Linux to the newly released version.
add raw=true.
Support both 32 and 64-bit platforms.
Merge pull request #4 from gijsbers/master

Update How-To-Build guide to new Github situation.  Add a handy install script.