t1120: Added configurable "donation ham" minimum and maximum thresholds to Springboard Statistics, to exclude donations with spurious amounts from donation forms' counts and totals.
ticket 1122 fix billing update sustainers custom charge dates
fixed an update hook that returned an array.
Changed confusing text in upsell site settings to be less confusing.
code style changes
Merge pull request #599 from JacksonRiver/7.x-4.x-1039-upsell_text_change

Changed confusing text in upsell site settings to be less confusing.
Merge pull request #598 from JacksonRiver/7.x-4.x-512-update_hook_return_value

Fixed a secure prepopulate update hook that returned an array.
Merge pull request #596 from JacksonRiver/t1120-springboard_stats-spam-donations

Exclude spam donations from Springboard Statistics
Couple more code style things.
Merge pull request #597 from JacksonRiver/7.x-4.x_1122_billing_update__causes_wrong_sustainers_date

ticket 1122 fix billing update sustainers custom charge dates
renamed the README extension.
proposed new README.
Merge pull request #602 from JacksonRiver/7.x-4.x-3-readme

Suggestions for improving the readme
Facebook image settings now inherited from personal campaign thumbnail setting
Added code to keep personal campaign thumbnail and facebook share image in sync
Merge remote-tracking branch 'origin/7.x-4.x-660-personal-campaign-social-settings' into cs-27722-7.x-4.1.1