Added more r_type tokens to helper
Changed #build_instruction to not modify passed array of tokens
Added generic #convert_hex #convert_binary tests to helper
Fixed typo in argument name for #test_convert_binary
Changed tests to use helper testing methods
Added sub tests to #convert_hex and #convert_binary
Added more r_type instructions to sample lines
Added AND tests
Added xor tests
added or tests
added sll tests
Added cmp tests
Fix assembler to work with cmp
Fix expected results for cmp tokens
Fixed assembler to work with jr
Merge pull request #4 from David1Socha/r_type_tests

R type tests