Remove travis, appveyor files and remove gtest submodule (#178)

.gitmodules

@@ -1,9 +1,6 @@
 [submodule "libs/sol"]
 	path = libs/sol
 	url = https://github.com/ThePhD/sol2.git
-[submodule "libs/gtest"]
-	path = libs/gtest
-	url = https://github.com/google/googletest.git
 [submodule "libs/u-test"]
 	path = libs/u-test
 	url = https://github.com/IUdalov/u-test.git

.travis.yml

@@ -1,56 +0,0 @@
-language: cpp
-sudo: required
-osx_image: xcode10
-dist: Xenial 
-
-os:
- - linux
- - osx
-
-compiler:
- - g++-5
- - clang++
-
-matrix:
-  exclude:
-  - os: linux
-    compiler: clang++
-  - os: osx
-    compiler: g++-5
-
-env:
-  global:
-  - STESS=1
-  matrix:
-    - LUA="lua 5.1" BUILD_TYPE=debug
-    - LUA="lua 5.1" BUILD_TYPE=release
-    - LUA="lua 5.2" BUILD_TYPE=debug
-    - LUA="lua 5.2" BUILD_TYPE=release
-    - LUA="lua 5.3" BUILD_TYPE=debug
-    - LUA="lua 5.3" BUILD_TYPE=release
-    - LUA="luajit 2.0" BUILD_TYPE=debug
-    - LUA="luajit 2.0" BUILD_TYPE=release
-
-before_install:
-  - sudo pip install hererocks
-  - hererocks lua-pkg --$LUA -rlatest
-  - source lua-pkg/bin/activate 
-
-script:
-  - export CXX=${TRAVIS_COMPILER}
-  - cmake -H. -B$BUILD_TYPE -G"Unix Makefiles" -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DLUA_INCLUDE_DIR="$PWD/lua-pkg/include"
-  - cmake --build $BUILD_TYPE --config $BUILD_TYPE
-  - cd $BUILD_TYPE && lua ../tests/lua/run_tests
-  - tar cvfz effil-${TRAVIS_TAG}-$(echo "$LUA" | tr -d ' ')-$(${TRAVIS_COMPILER} -dumpmachine).tar.gz effil.so
-
-deploy:
-    provider:     releases
-    file_glob:    true
-    file:         effil-*.tar.gz
-    skip_cleanup: true
-    overwrite:    true
-    api_key:
-        secure: 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
-    on:
-        tags: true
-        condition: $BUILD_TYPE = release

appveyor.yml

@@ -1,57 +0,0 @@
-image: Visual Studio 2015
-
-configuration:
-  - release
-#  - debug
-
-platform:
-  - x86
-  - x64
-
-environment:
-  global:
-    STRESS: 1
-  matrix:
-    - { LUA: "lua 5.1",    LUA_NAME: "lua5.1" }
-    - { LUA: "lua 5.2",    LUA_NAME: "lua5.2" }
-    - { LUA: "lua 5.3",    LUA_NAME: "lua5.3" }
-    - { LUA: "luajit 2.0", LUA_NAME: "luajit2.0" }
-    # - LUA: "luajit 2.1" # currently failing
-
-matrix:
-  exclude:
-    - platform: x86
-      LUA: "luajit 2.0"
-      LUA_NAME: "luajit2.0"
-
-before_build:
-  - git submodule update --init --recursive
-  - pip install hererocks
-  - if "%PLATFORM%"=="x86" (set WinType="32") else (set WinType="64")
-  - hererocks env --%LUA% -rlatest --target vs_%WinType%
-  - call env\bin\activate
-
-build_script:
-  - mkdir build
-  - cd build
-  - if "%PLATFORM%"=="x86" (set WinType="Win32") else (set WinType="x64")
-  - cmake .. -G "Visual Studio 14 2015" -A %WinType%
-  - cmake --build . --config %CONFIGURATION%
-  - 7z a effil-%APPVEYOR_REPO_TAG_NAME%-%LUA_NAME%-Win-%PLATFORM%.zip effil.dll
-
-test_script:
-  - lua ../tests/lua/run_tests
-
-artifacts:
-  - path: build/*.zip
-
-deploy:
-    provider: GitHub
-    description: '$(APPVEYOR_REPO_TAG_NAME)'
-    auth_token:
-        secure: MmJswKplsV+hzQb/WtStw825jGE74AwQsBlqMRW7/2stpVPVwahjOcLuIv9WXkbL
-    artifact: /.*\.zip/
-    force_update: true
-    on:
-        appveyor_repo_tag: true
-        configuration: release

libs/gtest

@@ -1 +0,0 @@
-Subproject commit 9ae086a9ebafabdc49b71bb7f3879f551adee09a