Refactored PlanningComparisonService to make it more readable.
comparisons for: status, type, responsible.

contains some bugfixes too.
changelog.
make every attribute comparable.

for now: add project.
tests for time comparisons.
Merge remote-tracking branch 'origin/feature/rails3' into feature/magic_comparison

Conflicts:
	app/assets/javascripts/timelines.js
	app/views/timelines/_timeline.html.erb
	doc/CHANGELOG.md
changelog added. sorted.
Merge remote-tracking branch 'origin/feature/rails3' into feature/magic_comparison
bugfix. rename some due dates.
get timeline rows and cells. test status.
Fixes security issues around :visited in IE10.
Updates deprecated method call.
Moves noscript into body.
Introduces HTML5 doctype.
Restores now-line in timelines.

Date.DAY somehow doesn't exist anymore.
Changelog.
Adds bug spec
Implements bulk file attachment on AaA
Attaches files before saving the work package
Prevents saving a new WP on attachment change