Added QueryResult and patched bugs

QueryResult now stores result items and position data, which aligns more
strongly with the rest of the library features than a plain
[]interface[}.  The design of the parser_test unittest was revised to
use array/map/scalar serialization (like match_test), since Go 1.3
redesigned maps to randomly order their keys. Since naive comparisons of
map data is now no longer possible, the unittest now sorts map
keys:value combinations.

* Patched a bug where getPosition("") was returning an invalid Position
* Revised parser_test to use serialization for comparisons for Go 1.3

parser.go

@@ -70,9 +70,6 @@ func (p *parser) getToken() *token {
 func parseStart(p *parser) parserStateFn {
 	tok := p.peek()
 
-	// prime position data with root tree instance
-	p.tree.position = tok.Position
-
 	// end of stream, parsing is finished
 	if tok == nil {
 		return nil
@@ -279,6 +276,7 @@ func parseArray(p *parser) []interface{} {
 
 func parse(flow chan token) *TomlTree {
 	result := newTomlTree()
+  result.position = Position{1,1}
 	parser := &parser{
 		flow:          flow,
 		tree:          result,