Merge pull request aimacode#91 from j129008/AIMA3e

README misspell pull request merged.

Author: ctjoreilly

aima-core/README.txt

@@ -53,7 +53,7 @@ that is all you need to do (unless you plan to write a different search than is
 To actually search you need to
   # configure a problem instance
   # select a search. Configure this with Tree Search or GraphSearch if applicable.
-  # instantiate a SerachAgent and 
+  # instantiate a SearchAgent and 
   # print any actions and metrics 
 
 A good example (from the NQueens Demo ) is: 
@@ -312,4 +312,4 @@ containing GUIs (thanks to Ruediger Lunde):<br>
 <br>    
 This will also be our last full release based on the 2nd edition of AIMA. 
 We are currently in the planning phases to re-organize this project based 
-on the 3rd edition of AIMA, which should be available soon.
+on the 3rd edition of AIMA, which should be available soon.