Fix broken images with spaces in filenames
May tie in well to #187.
Noticed that on https://docs.civicrm.org/user/en/4.7/advanced-configuration/email-system-configuration/#configuring-outbound-email-service there's a missing image.
Seems to be resolved by getting rid of the spaces in the filenames, so here's a list of other images with spaces we might need to clean up.
img/4.5 Add Relationship.png
img/4.5 Menubar.png
img/AB Testing Compose Screen1.png
img/AB Testing Metrics.png
img/AB Testing Results Page_1.png
img/AB Testing Targeting.png
img/AB Testing by Subject1.png
img/AB Testing by email1.png
img/AB Testing.png
img/Batch Update Contribution Via Profile.png
img/CiviCRM 4.5 CiviCase Activities.png
img/CiviCRM 4.5 CiviCase Standard Timeline.png
img/CiviReport_required fields.PNG
img/Contact Dashboard.png
img/Contact Search.png
img/Contribution Summary report grouping view.PNG
img/Contribution Summary report grouping.PNG
img/Custom Field Set.png
img/Editing Contacts.png
img/Event Badges UIv2.png
img/Event Badges UIv2.png.1
img/Event Price set v3.PNG
img/From email.PNG
img/GOTV tracking.jpg
img/Groups&tags_actions Update.png
img/Groups&tags_edit Smart Group criteria.png
img/Import Options.png
img/Mailing Basic Search.png
img/Membership Pricesets non-member field_1.PNG
img/Membership priceset final.PNG
img/New Contribution by Contact.png
img/New Data Entry.png
img/PCP owner notificationV2.PNG
img/Pledge including editing.PNG
img/Pledge payments batch entry cropped.PNG
img/Print contribution receipt options.PNG
img/QA Audit Screen.PNG
img/Repeated Event.png
img/Repeating Events.png
img/Repeting Event Page.png
img/SMS types.PNG
img/Screen Shot 2015-04-25 at 3.06.40 PM.png
img/Screen Shot 2015-04-29 at 3.54.21 PM.png
img/Screen shot 2011-08-27 at 16.28.28.png
img/Search Action.PNG
img/Search Builder.png
img/Search Setting.png
img/Simple housing case.PNG
img/Tag Set - Create.png
img/Tag Set - Creating tags on the fly.png
img/Thank-you letters as table template.PNG
img/Thank-you letters as table_1.PNG
img/Thank-you letters as with smarty enabled_2.PNG
img/Title settings 1 .jpg
img/Viewing Contacts.png
img/activity cf.png
img/activity report 1.jpg
img/activity report 2.jpg
img/advanced search schedule mass mailing.png
img/advanced search.PNG
img/civiengage custom data sets small.jpg
img/civimail_Insert image 6.jpg
img/civimail_file directory 3.jpg
img/civimail_window to browse server 2.jpg
img/contact Screen -inline edit.png
img/contact report listing.PNG
img/contribution amounts.jpg
img/create custom data sets.jpg
img/create walklist survey p2.jpg
img/create walklist survey.jpg
img/custom data for walklists.jpg
img/custom profile for walklist.jpg
img/dedupe config _1.png
img/email-dedupe config _1.png
img/engagement index.jpg
img/event location with warning.PNG
img/gift membership.PNG
img/joomla permissions_1.PNG
img/membership contribution report.PNG
img/membership detail from summary report.PNG
img/membership detail report sorting criteria.PNG
img/membership detail report sorting view.PNG
img/membership detail report.PNG
img/membership everyday for limited inherited.png
img/membership everyday for limited inheritedp2.png
img/membership lapsed report.PNG
img/membership page receipt 1.jpg
img/membership page receipt 2.jpg
img/membership report list_1.PNG
img/membership signup 1.jpg
img/membership summary report.PNG
img/memberships add membership new contact.JPG
img/memberships add membership via menu.JPG
img/memberships create new membership report_1.JPG
img/memberships export memberships screen.JPG
img/memberships find memberships.JPG
img/memberships select fields to export.JPG
img/new pledge batch_1.PNG
img/phonebank record responses.jpg
img/pledge batch edit.PNG
img/pledge table.png
img/record survey responses.jpg
img/scheduled_reminders_other three.PNG
img/survey report columns.PNG
img/survey report cover.jpg
img/survey report detail.jpg
img/survey report p2.jpg
img/survey set filters.jpg
img/tell a friend.jpg
img/walklist cover sheet.jpg
img/walklist p2.jpg
img/z-Sprint14 multi record old style table.png
img/z-Sprint2014 copy multli record.png
img/z-sprint14-membership status.png
img/z-sprint154 - new_membership_type.png
img/z-sprint15ipartial-payment view.png
img/z_sprint14_Deleting memberships.png
img/z_sprint14_Joomla!_Menu Item Type.png
img/z_sprint14_display Results as_1.png
img/z_sprint14_shortcode insert.png