Fix wrong method name call for FilterPrefixPath.
Merge pull request #9 from huacnlee/fix_filter_prefix_path_call_bug

Fix wrong method name call for FilterPrefixPath.
Fix a wrong logical for AddFuncMap method.
Merge pull request #10 from huacnlee/fix_add_func_map_method

Fix a wrong logical for AddFuncMap method.
add template test and cache module
update cache add mutex
add BeeTemplateExt
add  RenderBytes function
add template func Substr function
fix window's slash
fix window
add func html2str()
add func Html2str()
add func Html2str()
Merge pull request #19 from Unknwon/master

add func Html2str()
add just wheather the view is a dir
add exist
fix err
if template not exist
fix cache bug