remove travis (#28)

Co-authored-by: Dan Warner <info@danrw.com>

.travis.yml

@@ -1,90 +0,0 @@
-sudo: required
-dist: trusty
-language: cpp
-
-matrix:
-  include:
-
-    # Clang 4.0
-    - env: COMPILER=clang++-4.0
-      addons:
-        apt:
-          packages:
-            - clang-4.0
-            - g++-5
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-4.0
-
-    # Clang 5.0
-    - env: COMPILER=clang++-5.0
-      addons:
-        apt:
-          packages:
-            - clang-5.0
-            - g++-7
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-5.0
-
-    # Clang 6.0
-    - env: COMPILER=clang++-6.0
-      addons:
-        apt:
-          packages:
-            - clang-6.0
-            - g++-7
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-6.0
-
-    # Clang 7.0
-    - env: COMPILER=clang++-7
-      addons:
-        apt:
-          packages:
-            - clang-7
-            - g++-7
-          sources:
-            - ubuntu-toolchain-r-test
-            - sourceline: 'deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-7 main'
-              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
-
-    # GCC 5
-    - env: COMPILER=g++-5
-      addons:
-        apt:
-          packages: g++-5
-          sources:
-            - ubuntu-toolchain-r-test
-
-    # GCC 6
-    - env: COMPILER=g++-6
-      addons:
-        apt:
-          packages: g++-6
-          sources:
-            - ubuntu-toolchain-r-test
-
-    # GCC 7
-    - env: COMPILER=g++-7
-      addons:
-        apt:
-          packages: g++-7
-          sources:
-            - ubuntu-toolchain-r-test
-
-install:
-    # Set the ${CXX} variable properly
-    - export CXX=${COMPILER}
-    - ${CXX} --version
-    # Travis machines have 2 cores
-    - JOBS=2
-before_script:
-    # have CMake generate build files
-    - cd "${TRAVIS_BUILD_DIR}"
-    - mkdir build && cd build
-    - cmake ..
-script:
-    # build
-    - cmake --build . -- -j${JOBS}

README.md

@@ -1,8 +1,6 @@
 SGP4 library
 ============
 
-[![Build Status](https://travis-ci.org/dnwrnr/sgp4.svg?branch=master)](https://travis-ci.org/dnwrnr/sgp4)
-
 License
 -------