Reduce size of images from 25MB to 13MB using pngquant

Took it from https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/3232 [ci skip]

Reduce size of images from 25MB to 13MB using pngquant
af1dabe8 · Achilleas Pipinellis · 0c921e3e · 0c921e3e · af1dabe8 · 0c921e3e
Commit af1dabe8 authored 8 years ago by Achilleas Pipinellis
--- a/doc/administration/img/custom_hooks_error_msg.png
+++ b/doc/administration/img/custom_hooks_error_msg.png
--- a/doc/administration/img/high_availability/active-active-diagram.png
+++ b/doc/administration/img/high_availability/active-active-diagram.png
--- a/doc/administration/img/high_availability/active-passive-diagram.png
+++ b/doc/administration/img/high_availability/active-passive-diagram.png
--- a/doc/administration/img/housekeeping_settings.png
+++ b/doc/administration/img/housekeeping_settings.png
--- a/doc/administration/img/raketasks/check_repos_output.png
+++ b/doc/administration/img/raketasks/check_repos_output.png
--- a/doc/administration/img/repository_storages_admin_ui.png
+++ b/doc/administration/img/repository_storages_admin_ui.png
--- a/doc/administration/monitoring/performance/img/grafana_dashboard_dropdown.png
+++ b/doc/administration/monitoring/performance/img/grafana_dashboard_dropdown.png
--- a/doc/administration/monitoring/performance/img/grafana_dashboard_import.png
+++ b/doc/administration/monitoring/performance/img/grafana_dashboard_import.png
--- a/doc/administration/monitoring/performance/img/grafana_data_source_configuration.png
+++ b/doc/administration/monitoring/performance/img/grafana_data_source_configuration.png
--- a/doc/administration/monitoring/performance/img/grafana_data_source_empty.png
+++ b/doc/administration/monitoring/performance/img/grafana_data_source_empty.png
--- a/doc/administration/monitoring/performance/img/grafana_save_icon.png
+++ b/doc/administration/monitoring/performance/img/grafana_save_icon.png
--- a/doc/administration/monitoring/performance/img/metrics_gitlab_configuration_settings.png
+++ b/doc/administration/monitoring/performance/img/metrics_gitlab_configuration_settings.png
--- a/doc/administration/monitoring/performance/img/request_profile_result.png
+++ b/doc/administration/monitoring/performance/img/request_profile_result.png
--- a/doc/administration/monitoring/performance/img/request_profiling_token.png
+++ b/doc/administration/monitoring/performance/img/request_profiling_token.png
--- a/doc/administration/operations/img/sidekiq_job_throttling.png
+++ b/doc/administration/operations/img/sidekiq_job_throttling.png
--- a/doc/ci/img/builds_tab.png
+++ b/doc/ci/img/builds_tab.png
--- a/doc/ci/img/deployments_view.png
+++ b/doc/ci/img/deployments_view.png
--- a/doc/ci/img/environments_available_staging.png
+++ b/doc/ci/img/environments_available_staging.png
--- a/doc/ci/img/environments_dynamic_groups.png
+++ b/doc/ci/img/environments_dynamic_groups.png
--- a/doc/ci/img/environments_link_url.png
+++ b/doc/ci/img/environments_link_url.png