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?