Merge pull request #3 from jimobrien/feat/io

(fix) file reader
(refactor)Small edits to src/lib.rs
Merge pull request #4 from seanchen1991/master

(refactor)Small edits to src/lib.rs
(feat) added helper function to parse mustache tags
Merge pull request #5 from jangahroo/feat/regex-parse

(feat) added helper function to parse mustache tags
(feat) add render template helper