Add a --partition-table-offset flag that corresponds to esp-idf's CONFIG_PARTITION_TABLE_OFFSET
If the flag is specified, the partition table will be flashed to the given location.
If the flag is omitted, the partition table location will be determined automatically from the partition table by subtracting 0x1000 from the first partition, which should be the most common case.
The location of the application is now automatically determined from the partition table instead of the hard-coded 0x10000.
--partition-table-offsetflag that corresponds to esp-idf'sCONFIG_PARTITION_TABLE_OFFSETCloses #458