Multiple fixes and improvements

[felipecsl]

• Fix gemspec files and dependency on extlib

This fixes 3 issues when installing/using the gem:

1 Missing files referenced in gemspec:

wukong at /Users/felipe/.rvm/gems/ruby-1.9.3-p194/bundler/gems/wukong-d656650bdae9 did not have a valid gemspec.
This prevents bundler from installing bins or native extensions, but that may not affect its functionality.
The validation message from Rubygems was:
  ["examples/server_logs/breadcrumb_edges.rb", "examples/server_logs/histograms.rb", "examples/server_logs/page_counts.pig", "notes/away/icss/icss_specification.textile", "notes/away/swineherd/swineherd-old-readme.textile", "notes/away/wukong-fs/wukong-fs-old-readme.textile", "notes/away/wukong-transform/wukong-processor-old-readme.textile", "spec/data/a_atsigns_b.tsv", "spec/data/a_follows_b.tsv", "spec/data/tweet.tsv", "spec/data/twitter_user.tsv"] are not files

2 Missing dependency on extlib:

➜  wukong git:(master) ✗ bundle exec irb

1.9.3-p194 :001 > require 'wukong'

LoadError: cannot load such file -- extlib/blank

3 Missing dep on right_aws:

/Users/felipe/.rvm/gems/ruby-1.9.3-p194/bundler/gems/wukong-f25cbb17dbd1/lib/wukong/script/emr_command.rb:1:in `require': cannot load such file -- right_aws (LoadError)
    from /Users/felipe/.rvm/gems/ruby-1.9.3-p194/bundler/gems/wukong-f25cbb17dbd1/lib/wukong/script/emr_command.rb:1:in `<top (required)>'
    from /Users/felipe/.rvm/gems/ruby-1.9.3-p194/bundler/gems/wukong-f25cbb17dbd1/lib/wukong/script.rb:154:in `require'
    from /Users/felipe/.rvm/gems/ruby-1.9.3-p194/bundler/gems/wukong-f25cbb17dbd1/lib/wukong/script.rb:154:in `run'
    from /Users/felipe/.rvm/gems/ruby-1.9.3-p194/bundler/gems/wukong-f25cbb17dbd1/lib/wukong.rb:16:in `run'

[felipecsl]

Also found and fixed a problem with emr_extra_args where it was exploding here:

/Users/felipe/Data/Projects/wukong/lib/wukong/script/emr_command.rb:76:in `execute_emr_runner': can't convert String into Array (TypeError)
    from /Users/felipe/Data/Projects/wukong/lib/wukong/script/emr_command.rb:32:in `execute_emr_workflow'
    from /Users/felipe/Data/Projects/wukong/lib/wukong/script.rb:155:in `run'
    from /Users/felipe/Data/Projects/wukong/lib/wukong.rb:16:in `run'
    from visits_runner.rb:7:in `<main>'

[felipecsl]

Added Settings config option to allow specifying which AWS region to run the job via emr_region option

[mrflip]

sorry for neglecting this -- we've moved the primary wukong branch to infochimps-labs/wukong, so I totally missed this. If I haven't merged this in by later this week please poke us: http://github.com/infochimps-labs/wukong/issues.

[felipecsl]

Alright @mrflip thanks :)

[felipecsl]

Any update on this, @mrflip ?

[felipecsl]

Is this repository still maintained, or we should be using the infochimps-labs version?