fixed typo in rails3 plugin and added one alias for migrating and redoing migration if it was successful

plugins/rails3/rails3.plugin.zsh

@@ -3,6 +3,8 @@ alias rg='ruby script/rails generate'
 alias rd='ruby script/rails destroy'
 alias rp='ruby script/rails plugin'
 alias rdbm='rake db:migrate db:test:clone'
+alias rdbmr='rake db:migrate && rake db:migrate:redo'
 alias rc='ruby script/rails console'
-alias rd='ruby script/rais server --debugger'
+alias rd='ruby script/rails server --debugger'
 alias devlog='tail -f log/development.log'
+