fix phpdoc in i18n, Change \r\n to \r
enable i18n with Accept-Language and session
rearrange Request code
fix phpdoc in Request
move init_i18n to Controller_Base and i18n tools to I18n
fix translation on homepage (en-us)
Merge pull request #29 from dotkrnl/i18n

enable i18n with Accept-Language and session