Add new Target hook to access target-specific information.
Remove ideally unneeded code

mixin __vector(T[n]).identifier is not valid syntax, because vector type never have template declaration.
Refactor TemplateMixin symbol resolution
fix Issue 9545 - ICE with member template instantiation
Reject invalid expression in front-end
Merge pull request #1678 from 9rnsr/fix9545

[REG 2.063a] Issue 9545 - ICE with member template instantiation
Merge pull request #1666 from 9rnsr/refactor_mixin

[Refactoring] TemplateMixin symbol resolution
Merge pull request #1626 from ibuclaw/target1

Target data structure - p1