Put every option in the config

Integrated steps per revolution and microstepping settings, also put in
travel limits for both axis
Input MS3 in config

Needs more work so that it is actually used
Integrated line numbering, checksum and resend reprap-style

Checksum code is from the Reprap wiki, if the checksum doesn't match it
requests a resend via "rs [linenumber]"
New command structure:
N[linenumber] [commands like before]*checksum
small bugfix

ok: needs to be just ok
Personal config, ignore this
Baudrate now in config
private config
More changes to get MS3 integrated
Put X and Y Scaling factor in config
Ignore this. private config stuff
Revert "Ignore this. private config stuff"

This reverts commit 24f9da9bd7bd7af4cd9af529ddea5db96f50290e.
Revert "private config"

This reverts commit af32f8359394bbd515d99ed448f20b6295958e79.
Revert "Personal config, ignore this"

This reverts commit c4ffa86618910e9dc1e77f499d5b058822b2c907.
Merge pull request #17 from JamesT42/master

Checksums integrated + moved every option to the config