Add license, fix readme

README.md

src/main/java/hu/gerviba/authsch/response/AuthResponse.java

src/main/java/hu/gerviba/authsch/struct/BMEUnitScope.java

src/main/java/hu/gerviba/authsch/struct/Entrant.java

...ain/java/hu/gerviba/authsch/struct/PersonEntitlement.java

src/test/java/hu/gerviba/authsch/AuthResponseTest.java

src/test/java/hu/gerviba/authsch/AuthSchAPITest.java

src/test/java/hu/gerviba/authsch/ProfileResponseTest.java

src/test/java/hu/gerviba/authsch/struct/ScopeTest.java