Added support for hyphens in embedded resource folder names.
When msbuild compiles embedded resources into assemblies, hyphens are replaced with underscores in foldernames. This causes a mismatch when the EmbeddedStaticContentConventionBuilder is used to locate a resource, as it is still expecting the folder names to contain the hyphens.
Merge pull request #1062 from pwain/EmbeddedResourceHyphenSupport

Added support for hyphens in embedded resource folder names.