Add history notes for contributions.

Also.. No more TravisCI testing. We are only Azure Pipelines now.

.travis.yml

@@ -1,61 +0,0 @@
-branches:
-  only:
-    - /master.*/
-    - /develop.*/
-    - /feature\/.*/
-language: cpp
-script:
-  - pushd src/engine
-  - export CXX=${TRAVIS_COMPILER}
-  - ./build.sh ${TOOLSET}
-  - popd
-  - pushd test
-  - python test_all.py ${TOOLSET}
-  - popd
-  - src/engine/b2 --prefix=${HOME}/b2 install
-  - ls -laFR ${HOME}/b2
-stages:
-  - name: test current
-  - name: website update
-    if: branch IN (develop,master) AND type IN (push)
-dist: xenial
-jobs:
-  include:
-    - stage: test current
-      compiler: g++-8
-      env: TOOLSET=gcc
-      os: linux
-      addons:
-        apt:
-          packages:
-            - g++-8
-          sources:
-            - ubuntu-toolchain-r-test
-    - compiler: clang++-8
-      env: TOOLSET=clang
-      os: linux
-      addons:
-        apt:
-          packages:
-            - clang-8
-            - llvm-8-dev
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-xenial-8
-    - osx_image: xcode10.1
-      os: osx
-      env: TOOLSET=clang
-      compiler: clang
-    - stage: website update
-      os: linux
-      script:
-        - gem install asciidoctor
-        - gem install pygments.rb
-        - pip install --user Pygments
-        - pip install --user https://github.com/bfgroup/jam_pygments/archive/master.zip
-        - git config user.email "b2-bot"
-        - git config user.name "b2-bot"
-        - echo "using asciidoctor ;" >> project-config.jam
-        - ./bootstrap.sh --with-toolset=${TOOLSET}
-        - pushd doc
-        - ../b2 --website-doc-dir=manual/${TRAVIS_BRANCH} website

doc/src/history.adoc

@@ -13,3 +13,9 @@ engine and build system. Some changes in this start:
 * Requires {CPP} 11 to build engine.
 * Simplified build scripts to make it easier to maintain.
 * Building with {CPP} optimizations gives an immediate performance improvement.
+
+Other changes in this release:
+
+* Add support for using prebuilt OpenSSL. -- _Damian Jarek_
+* Define the riscv architecture feature. -- _Andreas Schwab_
+* Add ARM64 as a valid architecture for MSVC. -- _Marc Sweetgall_