Added gdbinit
Turned on gdb history (and git ignored it)
Updated gdbinit to autoconnect to the JLinkGDBServer instance.
Enabled and fixed spindle controls. Other minor fixes.
Add settings_othermill.h to xcode project, update settings for ARM board
Fix heartbeat LED pin number (was erroneously set to M1 Vref pin)
Fix canonical_machine enum print strings
Merge remote-tracking branch 'upstream/alden' into alden
Add JLink configuration to .gdbinit
Merge branch 'omc' into alden

Conflicts:
	TinyG2/TinyG2.xcodeproj/project.pbxproj