added readme.md
typos
Revert "Mail: SendmailMailer use CRLF in subject. [Closes nette/nette#1437]" See: https://github.com/nette/nette/pull/1437#issuecomment-40460904

This reverts commit 67d37e3c69f9d01a9130b9814ffa8f84598f79cc.
readme.md: added badge and link to Packagist
opened 2.3-dev
composer.json: requires iconv and suggests fileinfo