Added yealink common files for each model and created folder for new … (#2913)

* Added yealink common files for each model and created folder for new conference phone models

* Modified Yealink t46g templates and added 3 new variables

.gitignore

@@ -6,5 +6,7 @@ secure/mailto.bat
 secure/*.db
 secure/*.sqlite
 .DS_Store
-
-*.php~
+
+*.php~
+
+app/yealink/resources/firmware/*