just fixing a couple of typos

README

@@ -18,12 +18,12 @@ Summary:
 
 11 March, 2005 : Jessica Severin
   Project is reaching a very stable state.  New 'node' object Bio::EnsEMBL::Hive::Process
-  allows for imdependence from Ensembl Pipeline and provides extended process functionality
-  to manipulate hive job objects, branch, modify hive grpahs, create jobs, and other hive
+  allows for independence from Ensembl Pipeline and provides extended process functionality
+  to manipulate hive job objects, branch, modify hive graphs, create jobs, and other hive
   process specific tasks.  Some of this extended 'Process' API may still evolve.
 
 7 June, 2004 : Jessica Severin
-  This project is under active development and should be classified as per-alpha
+  This project is under active development and should be classified as pre-alpha
   Most of the design has been settled and I'm in the process of implementing the details
   but entire objects could disappear or drastically change as I approach the end.
   Watch this space for further developments