To install the AddOn, follow either of these instructions:
http://www.curse.com/content/AddonInstallGuide.aspx
http://www.wowinterface.com/forums/faq.php?faq=install#faq_howto_install

To configure the AddOn, simply edit the core.lua file (in any text editor) as instructed.

Thanks to Hershe of Silver Hand US for the concept and for testing and fixing my initial version.

==Change Log==
--v0.05--
Split many of the existing configuration constants into two separate constants, one for SPELL_AURA_APPLIED events and the other for SPELL_SUMMON events.

Added the SAP_CHANCE and SUMMON_CHANCE constants to adjust the frequency that messages are sent at.

Changed the SUMMON_MESSAGE string constant into the SUMMON_PHRASES table constant. Summon messages are now randomised like SPELL_AURA_APPLIED messages.

Moved the message randomisation code to a new local function GetMessage. The first argument is the variable that the message gets assigned to, the second is the table that the message is chosen from.

Changed some of the existing single line explanation comments to more detailed multi-line comments for easier reading.

--v0.04 (Hershe's Edit)--
-Summary-
Added a summon message and the ability to put the number of used/remaining charges in messages.

-Details-
Added the MESSAGE_CHANNEL, MESSAGE_LANGUAGE, SUMMON_MESSAGE and SUMMON_CHANNEL constants.

Added the charges_remaining and charges_used variables and the resetCharges function.

Added the "SMART" channel value to use RAID, PARTY or SAY depending on your group status.

Added the %c and %x tokens to the SPELL_AURA_APPLIED message to be replaced with charges_remaining and charges_used respectively.

--v0.03--
Added the sourceRaidFlags and destRaidFlags arguments to COMBAT_LOG_EVENT_UNFILTERED to fix for patch 4.2.

Changed Interface to 40200.

--v0.02 (Hershe's Second Fix)--
The PLAYER_GUID constant wasn't being assigned correctly during the loading process. If not already assigned, it will be assigned on the first occurrence of COMBAT_LOG_EVENT_UNFILTERED.