Delete nyan-cat.bin

What was it doing here anyways?
firmware: remove unused header file
release notes for v1.11
firmware: typo, fix warning
firmware: added hex files for v1.11
firmware: hex with different device class
Update release notes.txt
Delete micronucleus-1.11-entry_wdt_led_pb5.hex
Update Readme.txt
firmware: release 1.11 filename typo - renamed
Merge branch 'master' of github.com:micronucleus/micronucleus
upgrade: included 1.11 releases
commandline: Add cast to prevent warning
firmware: Removed class-ff binaries as they did not improve anything