Update semantic.d

fixed typo
Merge pull request #5 from Zoadian/patch-1

fixed typo
Comments asserts as DMD2.066 is regression free...
Cent and Ucent
Detect template that require a context and fail until this is implemented.
alias parameter propagate closure context
Embeded context in structs
Add DUB package description
Merge pull request #8 from Groterik/master

Add DUB package description
Embeded context pointer in structs on heap
Context for classes
Don't pass class/interface visitors by ref
Merge pull request #7 from schuetzm/fix-visitor-ref

Pass visitor by `auto ref`
Improve delegate and lambda name generation
Class with multiple contexts
Remove useless writeln
scope refactoring
Add convenience function to get size_t from object.d
32Bit fixed (cleand)