AMTCards 1.6.4.10 to 1.6.4.15

[Belinda Frick]

Version 1.6.4.10
Added Samsung 7200 in headset mode - phones act differently, and we use the speaker light events (EVT_TRANSFER_LIGHT) to control recording.

Version 1.6.4.11
Prevent agent codes that are too long from being used as virtual extensions on Siemens HiPath.

Version 1.6.4.12 (not for release)
Added support for Avaya Definity 2 wire (2400 range phones).

Version 1.6.4.13
Fixed bug where Avaya Definity 2-wire channels were not created on startup.
Added support for digits pressed for Avaya Definity 2-wire.

Version 1.6.4.14
Added LG LDK 50.

Version 1.6.4.15
Added support for Avaya IP Office (phone model 1403D)