Reworked WIG backend to use Cecil. Refactoring the build to use latest uniform IF.Build library. Working towards supporting sandboxed execution.

--HG--
branch : security
Build updates.

--HG--
branch : security
Fix ivy descriptor.

--HG--
branch : security
Fix ivy desc.

--HG--
branch : security
Relaxed Cecil constraint

--HG--
branch : security
Fixed package header.

--HG--
branch : security
Merged default.

--HG--
branch : security
Switched to AssemblyResolver from core.

--HG--
branch : security
Added test runner to website; fixed more issues with the new WIG backend.

--HG--
branch : security
merged.

--HG--
branch : security
Fix msb proj.

--HG--
branch : security
Fix formlet.css embedding.

--HG--
branch : security
Build fixes.

--HG--
branch : security
DateTime fix, String/Array improvements

--HG--
branch : security
property, build order, tests fixes

--HG--
branch : security
String/Array slice tests and fix

--HG--
branch : security
Fix website build.

--HG--
branch : security
Fixes to DateTime/slice, tests not running yet

--HG--
branch : security
OperatorIntrinsics file added

--HG--
branch : security
Merge

--HG--
branch : security