update LICENSE

ref.
https://git.suckless.org/slock/commit/aecfb3f6803bc2e7a5478aeb4f3390cbaaa563c7.html

Update license year

It actually was 2014 and not 2015.

Don't forget the E-Mail

Add myself to License

forgot that a while ago

prepare 1.3 release

applied sin's patch and prepared new release

applied Robert Schneider's Linux suggestions, also bumped version and updated LICENSE file's copyright notice

added XRaiseWindow workaround when new clients are launched

removed useless chars, prepared release

applied two patches, BSD_AUTH patch and Gottox' DPMS support patch

updating copyright stuff in slock as well

fixed a potential buffer overflow bug on the stack (thanks to Ghassan Misherg)

initial commit