master
From scram b code-format-all (clang-format)
Change shared HandleExceptionFactory to be const
Code formatting
Move ELseverityLevel to DataFormats/Common
Throw if dereference an unset edm::Handle
Renamed BranchDescription to ProductDescription
Removed support for thinning
Handle multiple threads reading RefCores
Pin the key function in a single object file.
Remove explicit assignment operator from edm::View
Move stored types in io_v1 namespace, reset class versions to 3
Protect isMergeable() from types with no dictionary