Modify genes to use the 'Name' structure for property names

[vedant-shroff]

The genes are currently stored as regular strings in propertyDefinitionMaps as shown here,

Genome/src/main/java/org/terasology/genome/genomeMap/GeneIndexGenomeMap.java

Line 30 in 2e274f5

private Map<String, GenePropertyDefinition> propertyDefinitionMap = new LinkedHashMap<>();

This could lead to problems during retrieval of trait values as there could be mismatch in upper and lower case. Using the Name structure from Gestalt (https://github.com/MovingBlocks/gestalt/blob/develop/gestalt-module/src/main/java/org/terasology/gestalt/naming/Name.java) would avoid unnecessary checks and modifications to Strings and work perfectly in this situation.