Make the Smalltalk generator use non-hardcoded namespaces.

- Make the Smalltalk generator use program->get_namespace("smalltalk.*")
  instead of program->get_smalltalk_{category|prefix}()
- Eliminate the explicit "smalltalk_{category|prefix}" in t_program.
- Deprecate the smalltalk_{category|prefix} tokens.
- Update example .thrift files and syntax files.

This was a little more complex than the others.  We now convert "." to "-"
in Smalltalk categories, because we no longer lex them as tok_st_identifier.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665601 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/tutorial/tutorial.thrift b/tutorial/tutorial.thrift
index 3a1b7d2..8a72f60 100755
--- a/tutorial/tutorial.thrift
+++ b/tutorial/tutorial.thrift
@@ -48,7 +48,7 @@
 namespace java tutorial
 php_namespace tutorial
 perl_package tutorial
-smalltalk_category Thrift-Tutorial
+namespace smalltalk.category Thrift.Tutorial
 
 /**
  * Thrift lets you do typedefs to get pretty names for your types. Standard