Fix mailing list location in Ia5

Partially fixes hollie/misterhouse#339
Fix Target for Links on docs/maillist.html

Partially fixes hollie/misterhouse#339
Delete reference to defunk IRC Channel

hollie/misterhouse#339
Add Target=_Blank to Download.pod

Only way I could figure out to do this was to use =begin HTML pod format.  This makes things a little messy.

hollie/misterhouse#339
Fix links in docs/examples.html

hollie/misterhouse#339
Empty Contents of docs/updates.pod and add Reference to GitHub ChangeLog

hollie/misterhouse#339
Fix for change in website contributed by Rick Reeves.
Change mh.pod to Note Win 95 or Greater Required, Remove Reference to Compiled

Plus do a quick cleanup of the rest of the pod documentation, scrubbing references to clearly outdated stuff.

Partial Fix hollie/misterhouse#339
Update Links on Intro.html to GitHub, Noted Win 95 or Newer

Partial Fix to hollie/misterhouse#339
Pulled Weather{Warning} out of weather_chance_of_rain.pl, and created weather_warnings.pl with more features such as announcements and a configurable trigger. Also added the ability to handle multi-line warning messages.
Various fixes for the calendar interface by @hplato

Ready for testing by others.
Cleanup Features HTML

More fixes for hollie/misterhouse#339
Competely Redo the Usage Web Page
Revive Authors Page

Partial fix to hollie/misterhouse#339
Initial checkin of Pushover.pm

Add support for notifications using the Pushover.net service.

 - Support notify() command to push a message
 - Implements basic rate limiting of duplicate messages
 - Tracks receipts and acknowledgment of priority 2 messages
Add global disable parameter

Pushover_disable = 1 to disable all notifications.  Messages will still
be logged as if notifications actually occurred.   Can be overridden on
individual notify() calls.
Fix Pushover compatibility with perl 5.8.8

Also, validate the incoming Hashref for new() and notify() so that
a malformed hash doesn't cause a crash.   if new() is malformed,
disable Pushover.    If notify() is malformed, allow the
notify to go forward but without any optional parameters.
xPL messages generate invalid msg-type

The Generic_Item code is calling sendXpl with the message type of
"xpl-stat",  however sendXpl adds the xpl- prefix as well, resulting in
an invalid message type.
Insteon_Thermo: Process Device Cmd Stack on Msg Ack

Failed to include proper calls to _process_command_stack in the Insteon::Thermostat::_process_message routine.

This likely has little effect on i2CS thermostats that had broadcast messages enabled because the thermostat immediatley issued a broadcast command which would cause MH to process the command stack.

However, i1 devices or i2cs devices without broadcast enabled, may have become "locked up" within MH after the issuance of a setpoitn change.
InsteonIP:  Add documentation

This completes the requirements for merging this into master.