;doc: 1.15 announcement

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doc/ANNOUNCE

@@ -1,33 +1,42 @@
-I'm pleased to announce the release of hledger 1.14!
-Thank you release contributors Jakob Schöttl and Jakub Zárybnický.
+I'm pleased to announce hledger 1.15 !
+Thanks to release contributors Caleb Maclennan, Jakob Schöttl, 
+Henning Thielemann, Dmitry Astapov, Ben Creasy, zieone, Boyd Kelly,
+Gabriel Ebner, Hans-Peter Deifel, and Andreas Pauley.
 
-hledger is a robust, cross-platform plain text accounting tool, for
-tracking money, time, stocks, cryptocurrencies or any other commodity,
-using double-entry accounting, private or shared plain text files,
-revision control, and command-line, curses or web UIs.
-Find out more at http://hledger.org and http://plaintextaccounting.org.
+hledger is a robust, cross-platform, multicurrency, plain text
+accounting tool, with command-line, console and web UIs. It is one of
+the leading implementations of plain text accounting, and is a modern
+and largely compatible reimplementation of Ledger. Use it for tracking
+money, time, stocks, cryptocurrencies or any other commodity,
+Learn more at http://hledger.org and http://plaintextaccounting.org .
 
-Release notes summary:
-----------------------
-Inclusive balance assertions, commodities command, --invert option,
-JSON get/add support in hledger-web.
+WHAT'S NEW:
 
-For full details, see http://hledger.org/release-notes.
+A new website, faster and more flexible valuation, more accurate close
+command, tags --values, new descriptions/payees/notes/diff commands,
+misc. fixes. For details, see
+https://hledger.org/release-notes#hledger-1-15 .
 
-Getting started:
-----------------
+GETTING STARTED:
 
-All install methods are described at http://hledger.org/download .
-(system packages, windows binaries, docker, nix, cabal, stack,
-hledger-install bash script..) Some of these might take a few days to
-become up to date.
+Many install methods are described at http://hledger.org/download .
+Some of these might take a few days to become up to date.
+You can build the latest by doing:
 
-Tutorials and all docs and support options are linked at http://hledger.org .
-Get help via chat in #hledger on Freenode: http://irc.hledger.org
-Or connect via Matrix: http://riot.hledger.org
+stack install --resolver=lts-14.4 hledger-lib-1.15 hledger-1.15 hledger-web-1.15 hledger-ui-1.15 --verbosity=error
 
-New and old users, contributors, sponsors, positive/negative feedback,
-always welcome!
+or:
+
+cabal v2-update && cabal v2-install hledger-1.15 hledger-web-1.15 hledger-ui-1.15
+
+To start recording transactions: "hledger add".
+To list more commands: "hledger".
+See http://hledger.org for tutorials and support,
+or join #hledger on Freenode (http://irc.hledger.org),
+or join via Matrix (http://riot.hledger.org).
+
+New and old users, contributors, sponsors, and all feedback are
+most welcome!
 
 Best,
 -Simon