ADD: @marshmellows42 's fixes for "lf cmdread" and CHANGELOG.md

ADD: @marshmellows42 's fixes for "lf cmdread" and CHANGELOG.md

ADD:  Added the "lf t55x7 wakeup" command. It will send a pwd,  and leave the antenna on.
Process like:
1. lf t55x7 wakeup p 11223344
2. lf search

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It is still not finished,  will work together with the "lf t55x7 commands" in next step when I figure out the process from the datasheets.