comment out some gulp plugins and tasks

prepare for travis ci, comment out some gulp plugins and tasks, modify package.json.
gulp dist, gulp test/dist work.

now gulp dist, gulp test/dist work.
in task dist: peasy is packaged to some different packages full, peasy, logicpeasy, linepeasy. samples and test/karma is concat too.
linepeasy pass tests in test/karma/peasy.js

with the help of gulp-twoside.js, linepeasy pass tests in test/karma/peasy.js