added Trace logging methods to Anotar.Custom

(tests failing due to some moduleweaving error)
updated moduleweaver bits so Anotar.Custom trace logging is working.

(tests passing)
Merge pull request #27 from thirkcircus/add_trace

Add Trace logging methods to Anotar.Custom
re-targeting Anotar.Custom.Fody to .net 4.0
Merge pull request #30 from thirkcircus/target_net40

re-targeting Anotar.Custom.Fody to .net 4.0
bump version
remove LoggerFactoryAttribute

fixes #28
better instruction replace logic

fixes #31
bump version
fix nuget attribute