Allow for custom functions in scripts to support the usual parameters.

Allow for custom functions in scripts to support the usual parameters.

The new syntax is:

    AddFunction FuncName param1=value1 param2=value2 { ... }

Where the parameter=value pairs can be used to determine if that function
meets the current conditions, e.g., mastery=1 to only have that function
be valid in the first specialization.

git-svn-id: svn://svn.curseforge.net/wow/ovale/mainline/trunk@1079 d5049fe3-3747-40f7-a4b5-f36d6801af5f