Update release readme / changelog / release notes

For releases notes and CHANGELOG.txt (that was long enough to build, I let you do the correct presentation as pleases you ;)):

New features & improvements

#?? by ??: Bulk user subscription, Token module integration
#1010684 by miro_dietiker: Support Elysia Cron hook_cronapi
#362044 by 1st-angel, Sutharsan: support node creation by other modules
#805114 by khaled.zaidan, Sutharsan, Thomas_Zahreddin & miro_dietiker: cleanup form creation process, addition of multi-signup block
#658242 by Sutharsan: Add single opt-in/out, hidden newsletters and the option to subscribe at registration
#936982 by miro_dietiker: support for Node Clone.
#910404 by DanChadwick: Support for conversion of tables in message body to plain-text
#579202 by miro_dietiker & Sutharsan: Exposing & updating language settings
#508802 by Sutharsan: Removal of confirmation step when an user clicks the subscription/unsubscription links provided in the email
#590736 by Sutharsan: add a class to the submit block
#948894 by jmrivero & Simon Georges: integration of the email_verify module is existing, allows other emails validation solution to be integrated easily
#308922 by joachim: Make core actions available to simplenews triggers
#846878 by mr.andrey, miro_dietiker: Add [simplenews-from-name] and [simplenews-from-mail] tokens
#466030 by netbear & Sutharsan: cache node_load() calls
#1010124 by skilip: pass node context to template_preprocess_simplenews_newsletter_footer()
#581058 by miro_dietiker: improve test adresse use
#942238 by Dave Cohen & miro_dietiker: directly populate spool in database, avoid php memory limit exhaust
#883376 by miro_dietiker: Separate mail functions into mail.inc
#781708 by Simon Geoges & miro_dietiker: move Simplenews node actions into tab
#1012142 by Sutharsan: hide test module from the module list
#1010592 by DrupOn, miro_dietiker: separates include folder
#668730 by DrupOn, miro_dietiker: integration with Views module

Bug fixes

#875672, #684864, #943980, #841520, #996392 by miro_dietiker, #292634 by miopa, miro_dietiker & Sutharsan, #839504 by fmjrey & miro_dietiker, #285719 by Sutharsan: lots of mutilanguage-related fixes
#1004634 by AlexisWilke: empty emails are taken as erroneous emails
#1002498 by pillarsdotnet: spellcheck of the whole module
#775172 by Sutharsan: no language prefix in [simplenews-subscribe-url] token
#976408 by carlescliment: undesired timeout when running cron from script
#684858 by miro_dietiker, Sutharsan: stop subscribed messages from appearing at each user login
#798020 by Sutharsan:
#412234 by Sutharsan: prevent Simplenews from sending erroneous nodes again & again
#722266 by AlexisWilke, Sutharsan: broken spool in PostgresSQL
#884338 by miro_dietiker: avoid spool duplication on node resave
#884348 by miro_dietiker: unsubscribed users not filtered in newsletter subscriptions page (regression from 1.x)
#776370 by Simon Georges, miro_dietiker: removing the permission to unsubscribe, so unsubscribe links always work
#904148 by miro_dietiker: don't unserialize twice user->data
#972778 by AlexisWilke: fix broken watchdog message
#520670 by neochief, Sutharsan: tranlsation fixes
#757242: all user profile fields are deleted on login
#650494 by Sutharsan: fix encoding newsletter Titles with special characters like '
#471594 by miro_dietiker: send newsletter as anonymous user
#777516 by miro_dietiker & Sutharsan: Add title to newsletter registration fieldset
#530242 by Sutharsan: spellcheck
#891558 by miro_dietiker: check new dependency to token on upgrade
#1004100 by organicwire: sending multilingual newsletters fails if using a nodereference field and the i18n module

Yeah, I was sure I was missing some of the history of the module, I'll trust you with that. I'll review README.txt today.

I've just added the multi-signup block to readme.txt.

Let's close this one too.