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/pooler.rb

@@ -19,13 +19,21 @@ class Pooler
   end
 
   def self.retrieve(verbose, os_type, token, url)
-    os = os_type.gsub(',','+')
     conn = Http.get_conn(verbose, url)
     if token
       conn.headers['X-AUTH-TOKEN'] = token
     end
 
-    response = conn.post "/vm/#{os}"
+    os_string = ""
+    os_type.each do |os,num|
+      num.times do |i|
+        os_string << os+"+"
+      end
+    end
+
+    os_string = os_string.chomp("+")
+
+    response = conn.post "/vm/#{os_string}"
 
     res_body = JSON.parse(response.body)
     res_body

lib/vmfloaty/version.rb

@@ -1,6 +1,6 @@
 
 class Version
-  @version = '0.2.6'
+  @version = '0.2.7'
 
   def self.get
     @version