When recursively loading configuration files, only include those files with a `.clj` or `.config` extension
Merge pull request #399 from dbriones/filter-config-files-by-extension

When recursively loading configuration files, only include those files with a `.clj` or `.config` extension
Clean up config/config-file?
Drop travis support for openjdk6, add oraclejdk8
config: Oh yeah, File needs to be imported