Merge pull request #4 from NuriCms/develop

Update point_level_icon.addon.php
Create README.md
modifying PHP author informaiton and Code refineing

NHN -> NURI Project
\r\n(why is it?) -> \n
line ending spaces -> removed.
modifying PHP author and code refineing
Code refineing
.
remodify author info.

write NHN as original author.
Merge pull request #19 from NuriCms/develop

오타 수정.
Merge pull request #20 from NuriCms/master

Master 에서 커밋을 해대서.. 다시 develop으로 가져옵니다.
Code refining

4 space to tab, and preg_replace to str_replace(if it is equal).
Reasonable patchs are applied.

https://code.google.com/p/xe-core/issues/detail?id=3462
https://code.google.com/p/xe-core/issues/detail?id=3486
Merge branch 'develop' into feature

Conflicts:
	addons/point_level_icon/conf/info.xml
	modules/admin/tpl/css/admin.min.css