Add version history to ivanx docs

docs/ivanx/update/versionhistory.txt

@@ -0,0 +1,51 @@
+1.0.0: Jan 2012: initial release
+
+1.0.1: Jan 2012: fixes Netatalk date-stamp bug (thanks to Steven Hirsch)
+
+1.0.2: Jan 2013: Netatalk 2.2.4; OS X 10.7+ login fixed; netboot fixes;
+                 Raspbian "Wheezy" support; Ubuntu 12.04 LTS support
+
+1.1.0: Apr 2013: Full GS/OS install; eliminated GS.SYSTEM volume;
+                 Raspberry Pi enhancements; lots of improvements to installer;
+                 more utilities installed for Apple II; improved cppo
+                 NOTE: fresh install required, can't update earlier version
+
+1.1.1: Jun 2013: Wi-Fi support; updates/additions to commands in a2server-help;
+                 bug fixes and improvements to install script; appletalk kernel
+                 module for Raspbian (instead of replacement kernel); RPi
+                 console (onboard serial) set to 19,200 bps during boot
+
+1.1.2: Oct 2013: resolves issue of no AppleTalk in Raspbian 2013-09-10 and
+                 later; faster command-line installation on Raspberry Pi
+                 (nulib2 and unar binaries are downloaded rather than compiled)
+
+1.1.3: Jan 2014: shares ADTPro disks folder as ADTDISKS; added environment
+                 variables for shared folders; can resolve by name
+                 "a2server.local" if network client has Bonjour/zeroconf;
+                 server presents itself as Shared computer to Macs on network;
+                 VM based on Debian 7
+
+1.1.4: Jan 2014: fixes bug with network boot if ADTPro disks folder is shared
+
+1.1.5: Jul 2014: a2server-setup fixes Raspbian 20-Jul-14 AppleTalk kernel panic
+
+1.2.0: Aug 2014: a2server-setup and Netatalk startup script addresses AppleTalk
+                 kernel panic on any Linux kernel 3.12-3.15; Netatalk starts
+                 in background, preventing startup delay; a2server-setup always
+                 configures Netatalk startup script and can download a new one
+                 if missing; a2server-setup on Raspbian or Debian 7 x86 is
+                 faster because it downloads binaries rather than compiling
+                 from source; unbit/unexec/usq unarchivers added; additional
+                 virtual machine which has both A2SERVER and A2CLOUD installed
+
+1.2.1: Jan 2015: minor fixes; support for LED blink on Raspbian 2015-01-31
+
+1.2.2: Mar 2015: installer improvements: now has command line options,
+                 including unattended install; installer sets passwords
+                 automatically to 'apple2'; status messages are now prefixed by
+                 A2SERVER:; can update Raspple II (Raspbian OS,
+                 NOOBS install manager, A2SERVER, and A2CLOUD); minor fixes.
+
+1.2.3: May 2015: changed Apple software links to Internet Archive
+
+1.2.4: Jul 2015: offer to download A2CLOUD disk contents onto A2FILES volume