U4-497 : Razor errors should be completely silent when UmbracoDebug=false.
Optionally requires macroErrors.config to define macro error behaviour.
See http://issues.umbraco.org/issue/U4-497.
U4-497 - Razor errors should be completely silent when UmbracoDebug=false.

Modified implementation to have a single global setting in UmbracoSettings.config
which can now be overridden when the umbraco.macro.Error event is handled on a
per-macro basis if desired.
Merge with 6.0.0
Added tag Release-6.0.1 for changeset 92410e141d9c
Closing branch 6.0.1
Merge with 6.0.1
Merge
Merge with 6.0.3
Fix default branch
Optimization for issue: U4-1187
Url: http://issues.umbraco.org/issue/U4-1187

Added assembly filtering, to stop scanning of third party assemblies
that doesn't reference the types we are looking for.
this limits the amount of possible missing references we encounter
when checking against the types
Closing again..
Merge with 6.0.4
Merge
Adding some minor changes/adjustments to the TypeFinder to make a bit more flexible for external usage.
Fixes #U4-2333
Resolves #U4-184 Upgrade package when installing a newer version.
Multiple package versions can be installed, only the latest version is listed under "Installed Packages".
When the installed package is viewed, a list of previously installed versions (of that package) are listed.
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