setup files for parser part

README.md

@@ -1,15 +1,19 @@
 # parser
 
-###Prerequisites
+### Prerequisites
 
 * Rexical (rex) 
+* Racc
 
-###Available commands
+### Available commands
 
 * `rake lexer` - generates `lexer.rb` file based on `specification.rex` file
+* `rake parser` - generates `parser.rb` file based on `grammar.y` file
+* `rake generate` - generates `lexer.rb` and `parser.rb` files
 
-###Testing
+### Testing
 
 To run only `lexer` tests, execute : `rspec spec/query_lexer_spec.rb`
+To run only `parser` tests, execute : `rspec spec/query_parser_spec.rb`
 
 To run all tests, execute : `rake spec`