Readme typo fix

README.md

@@ -13,7 +13,7 @@ var interp = new hscript.Interp();
 trace(interp.execute(ast));
 </pre>
 
-In case of parse error an `hscript.Expr.Error` is throwed. You can use `parser.line` to know the line number.
+In case of a parsing error an `hscript.Expr.Error` is thrown. You can use `parser.line` to know the line number.
 
 You can set some globaly accessible identifiers by using `interp.variables.set("name",value)`
 
@@ -30,4 +30,4 @@ You can use `parser.allowJSON` to allow JSON data.
 
 You can use `parser.allowTypes` to parse types for local vars, exceptions, function args and return types. Types are ignored by the interpreter.
 
-You can use `new hscript.Macro(pos).convert(ast)` to convert an hscript AST to a Haxe macros one.
+You can use `new hscript.Macro(pos).convert(ast)` to convert an hscript AST to a Haxe macros one.