Create unordered map type

[bcthund]

Using the t_VectorMap as a guide, create an unordered map version, to replace the current t_VectorMap for systems that don't require indexing or will be dynamic, as in having items removed. In a VectorMap removed items break the Map_si which maps a string name to a vector index. When an item is removed the map is no longer correct. So instead of reworking the Map_si to shift items, create the unordered map variation.

[bcthund]

• Create base t_UMap type
• Implements Methods
  • checkName("name")
  • setSource("source")
  • add("name")
  • remove("name")
  • get("name")
  • size()
• Implement overloads
  • operator["name"]
  • operator[index]
  • operator()
• Implement Begin and End for iteration

[bcthund]

Known systems to convert from VectorMap to UMap:

• Animations
• Particles
• GUI Elements
  • ComboBox list
  • Pie Chart
  • Other
• t_DataSet?