Removing Travis CI, minor changes in Readme (#30)

Author: mmzakhar

.travis.yml

@@ -17,7 +17,7 @@ applications:
 ===============  ===========================================
 Compilers        icc, ifort, dpcpp
 OS platforms     Linux, Windows, MacOS
-Install methods  Intel\ |r| installer, apt, docker container
+Install methods  Intel\ |r| installer, apt, docker container, CI cache
 ===============  ===========================================
 
 The config files show examples of all supported configurations. Delete
@@ -29,11 +29,10 @@ Status
 ==================  ==================================  ================
 CI                  Config                              Status
 ==================  ==================================  ================
-Travis CI           `.travis.yml`_                      |TravisStatus|
+GitHub Actions      `.github/workflows/build_all.yml`_  |GitHubStatus|
 Circle CI           `.circleci/config.yml`_             |CircleStatus|
 AppVeyor            `.appveyor.yml`_                    |AppVeyorStatus|
 GitLab CI           `.gitlab-ci.yml`_                   |GitLabStatus|
-GitHub Actions      `.github/workflows/build_all.yml`_  |GitHubStatus|
 Azure Pipelines     `.azure-pipelines.yml`_             |AzureStatus|
 ==================  ==================================  ================
 
@@ -46,11 +45,10 @@ CI           Linux APT        Linux Docker        Windows         MacOS
 -------- ----------------- ----------------- ----------------- -----------
 \        C++ Fortran DPC++ C++ Fortran DPC++ C++ Fortran DPC++ C++ Fortran
 ======== === ======= ===== === ======= ===== === ======= ===== === =======
-Travis   |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|
-Circle   |c|   |c|    |c|  |c|   |c|    |c|  |x|   |x|    |x|  |x|   |x|
+GitHub   |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|
+Circle   |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|    |c|  |x|   |x|
 AppVeyor |c|   |c|    |c|  |x|   |x|    |x|  |c|   |c|    |c|  |c|   |c|
 GitLab   |c|   |c|    |c|  |x|   |x|    |x|  |c|   |c|    |c|  |x|   |x|
-GitHub   |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|
 Azure    |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|    |c|  |c|   |c|
 ======== === ======= ===== === ======= ===== === ======= ===== === =======
 
@@ -80,15 +78,14 @@ See `security guidelines`_.
 .. _contributing: CONTRIBUTING.rst
 .. _`security guidelines`: https://www.intel.com/content/www/us/en/security-center/default.html
 
-.. _`.travis.yml`: .travis.yml
+.. _`.github/workflows/build_all.yml`: .github/workflows/build_all.yml
 .. _`.circleci/config.yml`: .circleci/config.yml
 .. _`.appveyor.yml`: .appveyor.yml
 .. _`.gitlab-ci.yml`: .gitlab-ci.yml
-.. _`.github/workflows/build_all.yml`: .github/workflows/build_all.yml
 .. _`.azure-pipelines.yml`: .azure-pipelines.yml
 
-.. |TravisStatus| image:: https://travis-ci.com/oneapi-src/oneapi-ci.svg?branch=master
-   :target: https://travis-ci.com/oneapi-src/oneapi-ci
+.. |GitHubStatus| image:: https://github.com/oneapi-src/oneapi-ci/workflows/build_all/badge.svg
+   :target: https://github.com/oneapi-src/oneapi-ci/actions?query=workflow%3Abuild_all
    :alt: Build status
 .. |CircleStatus| image:: https://circleci.com/gh/oneapi-src/oneapi-ci.svg
    :target: https://circleci.com/gh/oneapi-src/oneapi-ci
@@ -99,9 +96,6 @@ See `security guidelines`_.
 .. |GitLabStatus| image:: https://gitlab.com/rscohn2/oneapi-ci-mirror/badges/master/pipeline.svg
    :target: https://gitlab.com/rscohn2/oneapi-ci-mirror/-/commits/master
    :alt: Build status
-.. |GitHubStatus| image:: https://github.com/oneapi-src/oneapi-ci/workflows/build_all/badge.svg
-   :target: https://github.com/oneapi-src/oneapi-ci/actions?query=workflow%3Abuild_all
-   :alt: Build status
 .. |AzureStatus| image:: https://dev.azure.com/robertscohn/oneapi-ci-mirror/_apis/build/status/oneapi-src.oneapi-ci?branchName=master
    :target: https://dev.azure.com/robertscohn/oneapi-ci-mirror/_build
    :alt: Build status