Buffer RegularFileResource streams to do less read()'s
Merge with 1.7
prepend throws TypeError if called on a Class
reenable tests

run prepend specific with bin/jruby -S mspec spec/ruby/core/module/prepend*
for testing
rework prepends to match flow of includes
tweak method holder class/usage
closer...

set origin.methods to a new hash map
don't iterate inclusion point while prepending
IncludedModuleWrapper now looks at methodLocation
minor cleanup