Simplify Makefile, to allow for cross-compiling.
Fix indentation to use tabs, according to Linux kernel coding style.
Change include.
Simplify references to paired serial port.
Change version number to 1.2.
Add newlines to printk lines.
Initial .gitignore
Move hardware handshaking null-modem connections into a single function.
Clarify definition of number of pseudo serial port pairs.
Enable some data flow control according to the unread data buffer of the paired port.