my very first Octopress-Jekyll blog 'rake generate' errors

gistfile1.txt

jordi@i-ching:~/octopress$ rake generate
## Generating Site with Jekyll
identical source/stylesheets/screen.css 
WARNING: Could not read configuration. Using defaults (and options).
	(/home/jordi/octopress/_config.yml): could not find expected ':' while scanning a simple key at line 66 column 1
Building site: /home/jordi/octopress -> /home/jordi/octopress/_site
Liquid Exception: Unknown tag 'include_array' in index.html
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/block.rb:62:in `unknown_tag'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/tags/if.rb:31:in `unknown_tag'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/block.rb:32:in `parse'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/tag.rb:10:in `initialize'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/tags/if.rb:24:in `initialize'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/block.rb:28:in `new'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/block.rb:28:in `parse'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/document.rb:5:in `initialize'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/template.rb:58:in `new'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/template.rb:58:in `parse'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/liquid-2.3.0/lib/liquid/template.rb:46:in `parse'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/jekyll-0.12.0/lib/jekyll/convertible.rb:79:in `do_layout'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/jekyll-0.12.0/lib/jekyll/page.rb:100:in `render'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/jekyll-0.12.0/lib/jekyll/site.rb:204:in `block in render'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/jekyll-0.12.0/lib/jekyll/site.rb:203:in `each'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/jekyll-0.12.0/lib/jekyll/site.rb:203:in `render'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/jekyll-0.12.0/lib/jekyll/site.rb:41:in `process'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/gems/jekyll-0.12.0/bin/jekyll:264:in `<top (required)>'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/bin/jekyll:23:in `load'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/bin/jekyll:23:in `<main>'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/bin/ruby_executable_hooks:15:in `eval'
/home/jordi/.rvm/gems/ruby-2.0.0-p451/bin/ruby_executable_hooks:15:in `<main>'
Build Failed
jordi@i-ching:~/octopress$