Bug fix: Diverging time on startup

This bug would cause PPS-Client to start with a diverging negative jitter offset about half the time. The negative offset would eventually be corrected and PPS-Client would start normally. But this might delay startup unnecessarily,

Better pps-timer resolution

This release improves the pps-timer resolution and fixes minor bugs in that program.

Bug in Segregate

Fixed a buffer overflow in assignProcessorAffinity() in file pps-files.cpp.
The bug only appears when activating the segregate feature
in /etc/pps-client.conf.

PPS-Client v2.0.0

This release provides several new features:

1. It is no longer necessary to compile the kernel in order to install PPS-Client.

2. PPS-Client can now run on any Linux OS that provides installed LinuxPPS
   drivers, pps-gpio if the PPS signal is through GPIO or pps-ldisc if the PPS is
   provided through the DCD pin of a serial port.

3. PPS-Client will run on any processor with a Linux OS as above including
   ARM processors and AMD/Intel processors.

4. And, of course, numerous bug fixes.