This resolves Task# 19177: Rename reports on squish billing page
http://squish.ish.com.au/tasks/19177
The rows by columns caption has been added to the billing tables.
The caption now appears as Pivot Row filed by column filed
Not to be merged untill next commit.
Renamed 'Date' to 'Days of week'. The code for pivot by date will be added in next commit.
This renames the reports on squish billing page.
The "Date" option has been renamed to "Days of week"
Test cases have been included in this commit.
New Test case that was added has been debugged.
Merged rename reports fixed conflict
Test cases have been added in this commit.
"viks-rename-reports-on-squish-billing-page#19177" has been merged into this branch.
Removed the condition that was causing some worklogs to be left out
while generating the pivot report
Added a condition for  generating a blank billing title if the row or column value in the params is
not among the expected values.
Merge branch 'master' into viks-billing-report-more-than-seven-days-Task#19949

Conflicts:
	app/assets/stylesheets/bootstrap-override.scss
Repeating creation of factories in same context was causing the tests
to fail. Changed it in this commit.
Made the indentation changes in this commit
Introduced and interval of one day between creation times of widgets for Widgets controller
to avoid created_at to be same for two widgets if they are created within a second.
For every company the property with ID 1 was being searched becuase of use of filter name in form.
Now directly using filter property name instead of filter name so that
property for a company is searched by name.
Cleaining up the code
Removed the filter names being used in make_billing_title. Now using property names instead.
Kept a time interval of one day between "created_at" for tasks in
widgets_controller_spec.rb
Merge these changes for adding new filters like
"Today or later", "Yesterday or earlier" etc.
Merge branch 'master' into viks-due-date-filter-task16277
Merge branch 'viks-due-date-filter-task16277' into viks-billing-report-more-than-seven-days-Task#19949