Merge pull request #2 from kdepp/master

opt: support relative image path; add webroot in opt to support absolute...
相对路径支持
相对路径支持
update version
opt: comma fix
rename former test to old_test
opt (iParser): refactor _parse method
add: unit test on part of iParser refactor
opt: add test cases for iParser
opt: add fixme comment for iParser