Added list_processes and began adding process logic to Join button in interactions

modpol/processes/processes.lua

@@ -13,6 +13,21 @@
 
 modpol.processes = {}
 
+
+-- Function: modpol.list_processes
+-- output: a table of the names of processes
+function modpol.list_processes()
+   local output = {}
+   if modpol.processes then
+      for k,v in ipairs(modpol.processes) do
+         if v.name then
+            table.insert(output,v.name)
+         end
+      end
+   end
+   return output
+end
+
 -- ===================================================================
 -- Function: modpol.register_process
 -- Adds a process to modpol.processes