Added missing Summoner constants

* Added JOB_SUMMONER and EAJ_SUMMONER constants.
* Updated eA Job System documentation.

doc/ea_job_system.txt

@@ -13,10 +13,10 @@ Preface:
 -------------------------------------------------------------------------------
 
 	Most scripters are aware of the class values used in RO and their constants
-	specified on db/const.txt. Each class has a number associated to it for
-	referencing, so when someone's class is 9 that means they are a wizard.
-	However, this list of job numbers has no real order behind it, and no logic
-	behind it's assignation.
+	specified in src/map/script_constants.h. Each class has a number associated
+	to it for referencing, so when someone's class is 9 that means they are a
+	wizard. However, this list of job numbers has no real order behind it, and
+	no logic behind it's assignation.
 
 	You can add 3999 to a job to get their rebirth ID, but if you try to do the
 	same to get the Baby class ID, that fails on the super Baby class. Also,

src/map/script_constants.h

@@ -182,6 +182,8 @@
 
 	export_constant(JOB_REBELLION);
 
+	export_constant(JOB_SUMMONER);
+
 	/* EA jobs */
 	script_set_constant("EAJL_2_1",JOBL_2_1,false);
 	script_set_constant("EAJL_2_2",JOBL_2_2,false);
@@ -317,6 +319,8 @@
 	script_set_constant("EAJ_SUPER_NOVICE_E",MAPID_SUPER_NOVICE_E,false);
 	script_set_constant("EAJ_SUPER_BABY_E",MAPID_SUPER_BABY_E,false);
 
+	script_set_constant("EAJ_SUMMONER",MAPID_SUMMONER,false);
+
 	/* broadcasts */
 	export_constant(BC_ALL);
 	export_constant(BC_MAP);