Improve how to retrieve vms

This commit changes the get command to have users request vms by
specifying the hosts they want and then the number of hosts rather than
having to say each one separated by a comma.

lib/vmfloaty.rb

@@ -18,10 +18,10 @@ class Vmfloaty
     config = Conf.read_config
 
     command :get do |c|
-      c.syntax = 'floaty get [hostname,...]'
+      c.syntax = 'floaty get os_type1=x ox_type2=y ...'
       c.summary = 'Gets a vm or vms based on the os flag'
       c.description = ''
-      c.example 'Gets 3 vms', 'floaty get centos,centos,debian --user brian --url http://vmpooler.example.com'
+      c.example 'Gets 3 vms', 'floaty get centos=3 debian=1 --user brian --url http://vmpooler.example.com'
       c.option '--verbose', 'Enables verbose output'
       c.option '--user STRING', String, 'User to authenticate with'
       c.option '--url STRING', String, 'URL of vmpooler'
@@ -32,7 +32,13 @@ class Vmfloaty
         token = options.token || config['token']
         user = options.user ||= config['user']
         url = options.url ||= config['url']
-        os_types = args[0]
+
+        os_types = {}
+        args.each do |arg|
+          os_arr = arg.split("=")
+          os_types[os_arr[0]] = os_arr[1].to_i
+        end
+
         no_token = options.notoken
 
         if no_token