Explicit serialization functions used instead of reflection, to avoid deserialization problems on Mono.
Version number added to makefiles to allow versioning in future.
Makefiles still disabled if the host platform differs from the built platform, to continue to avoid any problems 'when building with RPCUtility'.
#codereview robert.manuszewski,michael.trepka
[CL 2643502 by Steve Robb in Main branch]
UEBuildModule stores its .Module.cs filename.
UEBuildTarget stores a map of dictionaries from module names to .Target.cs files.
Timestamps of serialized .Target.cs and .Module.cs files compared against makefile and used for invalidation.
More sensible Dictionary logic in ConditionallyCompileAndLoadRulesAssembly.
InstantiateModule can no longer return a null.
UEBuildModule constructors no longer default.
#codereview robert.manuszewski
[CL 2543446 by Steve Robb in Main branch]
- Shaved over *half a second* of the best case iterative build times with UnrealBuildTool
- When assembling a build from an existing UBTMakefile, we now load Target information from the makefile instead of from the C# assembly
[CL 2278065 by Mike Fricker in Main branch]
#change UBT: Added support for hot-reload when UBT is called from IDE and the current target is curring
#change Added support for hot-reload from VS to the engine
#change Refactored hot-reload functionality to a separarte module
#change Added hot-reload analytics events
[CL 2255801 by Robert Manuszewski in Main branch]
