Version bump to 1.3.3
create gemspec with jeweler
ignore vim swap files
load test helper with absolut path (ruby 1.9 does not include . in $:
rename Array#sum to #sum_with_identity to avaoid conflicts with activesupport etc
Version bump to 1.3.4
cannot monkey-patch GSL::Vector => call #sum_with_indentity only unless $GSL
Fix merge conflict