Implement many Tcl_*Var* functions and Tcl_GetIndexFromObj as (faster/stack-saving) macros around resp their Tcl_*Var*2 equivalent and Tcl_GetIndexFromObjStruct
Update dde to version 1.3.3. 
Update registry to version 1.2.2. 
(the same as distributed with Tcl 8.5.14)
(::platform::LibcVersion): Followup to the 2013-01-30 change. The RE
become too restrictive again. SuSe added a timestamp after the
version. Loosened up a bit. Bumped package to version 1.0.12.
Add support for Cygwin64, which has a 64-bit "long" type. 
Binary compatibility with win64 requires that all stub entries use 32-bit long's, therefore the	need for various wrapper functions/macros. 
For Tcl 9 a better solution is needed, but that cannot be done without introducing binary incompatibility.
merge 8.4