ENH: move travis support scripts to .travis_scripts

Move the build support scripts for travis to a hidden
subdirectory to keep the top level directory more
clean.

.travis_scripts/travis.before_install.linux.sh

@@ -0,0 +1,7 @@
+set -vex
+#before_install: pyenv install 3.5.4 && pyenv global 3.5.4
+#before_install: pyenv global 3.6
+# https://docs.travis-ci.com/user/languages/python/
+# "for Trusty, this means 2.7.6 and 3.4.3"
+
+pyenv global 3.6

.travis_scripts/travis.before_install.osx.sh

@@ -0,0 +1,5 @@
+# NOTHING TO DO HERE
+# set -vex
+ 
+#brew install pyenv
+#which pyenv

.travis_scripts/travis.install.linux.sh

@@ -0,0 +1,14 @@
+set -vex
+
+wget https://github.com/ninja-build/ninja/releases/download/v1.7.2/ninja-linux.zip
+unzip -q ninja-linux.zip -d build
+
+pip3 install meson
+# /usr/bin/gcc is 4.6 always, but gcc-X.Y is available.
+if [[ $CXX = g++ ]]; then export CXX="g++-4.9" CC="gcc-4.9"; fi
+# /usr/bin/clang has a conflict with gcc, so use clang-X.Y.
+if [[ $CXX = clang++ ]]; then export CXX="clang++-3.5" CC="clang-3.5"; fi
+echo ${PATH}
+ls /usr/local
+ls /usr/local/bin
+export PATH="${PWD}"/build:/usr/local/bin:/usr/bin:${PATH}

.travis_scripts/travis.install.osx.sh

@@ -0,0 +1,5 @@
+# NOTHING TO DO HERE
+# set -vex
+
+#python3 -m venv venv
+#source venv/bin/activate

.travis_scripts/travis.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env sh
+# This is called by `.travis.yml` via Travis CI.
+# Travis supplies $TRAVIS_OS_NAME.
+#  http://docs.travis-ci.com/user/multi-os/
+# Our .travis.yml also defines:
+#   - SHARED_LIB=ON/OFF
+#   - STATIC_LIB=ON/OFF
+#   - CMAKE_PKG=ON/OFF
+#   - BUILD_TYPE=release/debug
+#   - VERBOSE_MAKE=false/true
+#   - VERBOSE (set or not)
+
+# -e: fail on error
+# -v: show commands
+# -x: show expanded commands
+set -vex
+
+env | sort
+
+which python3
+which meson
+which ninja
+echo ${CXX}
+${CXX} --version
+python3 --version
+meson --version
+ninja --version
+meson --buildtype ${BUILD_TYPE} --default-library ${LIB_TYPE} . build-${LIB_TYPE}
+ninja -v -C build-${LIB_TYPE}
+#ninja -v -C build-${LIB_TYPE} test
+cd build-${LIB_TYPE}
+meson test --no-rebuild --print-errorlogs
+cd -
+rm -r build-${LIB_TYPE}