Drop "sudo -E" when running "bundle install"

Get rid of erroneous "sudo -E" when running
"bundle install" as mentioned in README.md
as discussed in https://github.com/kmerz/graveio/pull/50
Merge pull request #52 from h5b/master

Drop "sudo -E" when running "bundle install"
Fix Typos in "public/bin/bury.rb".
Merge pull request #54 from h5b/bury

Fix Typos in "public/bin/bury.rb".
Add python to code-type list
Always use the most verbose log level specified

When options --debug and --verbose are specified, use the log level
debug instead of verbose as it includes all messages of the other log
levels.
Merge pull request #58 from Flowm/master

Thanks.
Merge pull request #57 from basti1508/add_python_SH

Add python to code-type list