Add fast field for associating arbitrary bytes to a document (#275)

* Add fast field for associating arbitrary bytes to a document

* Fix unused macro_use warning

* Improvements from code review

* Make BytesFastFieldWriter public

* Fix json parsing validation failure

* Add bytes fast field to CHANGELOG.md

* Fix compile errors from merge

* Support merging

* Address misc code review comments

* Fix comments from CR

src/query/query_parser/query_parser.rs

@@ -227,6 +227,10 @@ impl QueryParser {
                 let term = Term::from_field_text(field, phrase);
                 Ok(Some(LogicalLiteral::Term(term)))
             }
+            FieldType::Bytes => {
+                let field_name = self.schema.get_field_name(field).to_string();
+                Err(QueryParserError::FieldNotIndexed(field_name))
+            }
         }
     }