Shell template

I noticed that I usually write the same pieces of code at the start of every project. There's the shebang, the copyright header, the program name and the version. This is then followed by variables that holds the path to the binaries used in the script. After that is the sanity check to check for those binaries. Then there is the function for printing the help screen and usage text. So I thought it would be a good idea to keep all of this repeating code in template. And while at it create a neat function to get all the binaries used in the script into variables without having to manually specifiy the path by myself. With this template I can simply just specifiy the binaries to be used by the script and let a loop run through them and set varibles for them. This neat little function uses the 'which' program. This means that there is only one hardcoded binary path in the entire script. If the script fails to execute 'which' I just have to locate it manually and update a single variable.