Merge pull request #4 from kc-GitHub/master

Asksin_OTA_Bootloader mod for 4k bootloader space support e.g. for atmega328p and other.
- enabled config button in HM_LC_Sw1PBU_FM
- small bugfix in bootloader.c (unused variable when no config button used)
- fixed address in Readme for sreg_cat for 8k version
- bugfix in bin2eq3.php (adding one too many pages if pageborder is hit by bin-file, causing potential bootloader self erasing)