Support for flashing without mbedls

[VeliMattiLahtela]

Flashing a single device

>>> flasher.flash(build="C:\\path_to_file\\myfile.bin", target_id="0240000028884e450019700f6bf0000f8021000097969900", platform_name="K64F")

optional

• platform_name
• mount_point
• serial_port

If all required fields are available do not call mbedls at all (possible to use without mbedls)

[jupe]

perhaps this should be like:

>>> flasher.flash(build="C:\\path_to_file\\myfile.bin", mount_point="/mnt/daplink")

optional

• serial_port (for resetting?)

then we only need to "copy" file and perhaps verify that.
if only mandatory field is (build+) target_id we have to create something which mbedls does already well.