Making the commands a little more flexible in terminology

src/spm/spm.lua

@@ -36,10 +36,10 @@ local function printUsage()
     print("'spm list [-i] <filter>' to get a list of available packages containing the specified substring")
     print(" -i: Only list already installed packages")
     print("'spm info <package>' to get further information about a program package")
-    print("'spm install [-f] [-m] <package> [path]' to download a package to a directory on your system (or /usr by default)")
-    print("'spm update <package>' to update an already installed package")
-    print("'spm update all' to update every already installed package")
-    print("'spm uninstall <package>' to remove a package from your system")
+    print("'spm install|add [-f] [-m] <package> [path]' to download a package to a directory on your system (or /usr by default)")
+    print("'spm update|upgrade <package>' to update an already installed package")
+    print("'spm update|upgrade all' to update every already installed package")
+    print("'spm uninstall|remove <package>' to remove a package from your system")
     print(" -f: Force creation of directories and overwriting of existing files.")
 end
 
@@ -535,11 +535,11 @@ if args[1] == "list" then
     printPackages(tPacks)
 elseif args[1] == "info" then
     provideInfo(args[2])
-elseif args[1] == "install" then
+elseif args[1] == "install" or args[1] == "add" then
     installPackage(args[2], args[3], false)
-elseif args[1] == "update" then
+elseif args[1] == "update" or args[1] == "upgrade" then
     updatePackage(args[2])
-elseif args[1] == "uninstall" then
+elseif args[1] == "uninstall" or args[1] == "remove" then
     uninstallPackage(args[2])
 else
     printUsage()