refactoring of table.rb#draw - step1
refactoring of table.rb - step 2
refactor table.rb - step 3
refactor table.rb - step 4
refactor table.rb - step 5
refactor table.rb - step 6
refactor table.rb - step 7
refactor table.rb - step 8
refactor table.rb - step 9
refactor table.rb - step 10
refactor table.rb - step 11
refactor table.rb - step 12
updated changelog
refactor table.rb - step 13
Merge pull request #15 from prawnpdf/refactor

refactored draw method in table.rb to lower code complexity