Bug 72 - wrong thunk code generated.
Remove buggy y2lx/y2lxp1 intrinsics.
Don't invoke the GC for zero-length array initialisations.
Implement pure std.math functions, remove workaround in core.stdc.math.
Add 64-bit real support for lrint().
Fix floor/ceil for real==double targets.
Some small clean-ups to convert_expr.
More IRState reductions.
Remove dead code from driver.
Update gcc-4.9.x patches.
Move binfo generation into TypeClass::toCtype.
Some small refactoring around d-lang.cc.
Some more phasing out IRState in codegen.
C++-ify glue.
Bug 77 - ICE with static array argument
Remove all IRState functions from codegen.  Rename IRBase to IRState.
Remove redundant CONST_DECL code - may re-add later for debug purposes.
Fix debugging enum types/values.
Now emit manifest constant values to the debugger.
Update copyright years.