Change README to markdown format.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

README.md

@@ -7,19 +7,19 @@ SmartCard as an authentication source. It is designed to work with any
 OpenSC-supported, ISO 7816-4,-8 compliant, PKCS#11 enabled smartcard.
 
 Examples of such cards are:
- - The OpenPGP card (ISO ISO 7816-4,-8 compliant)
+- The OpenPGP card (ISO ISO 7816-4,-8 compliant)
 
 
-FEATURES:
-=========
+Features:
+---------
 
 * support encrypted LUKS partition
 * automatic login, lock, and unlock
 
+.
 
-
-CONTRIBUTING
-==============
+Contributing
+--------------
 
 If you wish to contribute to smartcardauth, you might do so: