delete README.md file on master branch
add a read me file
Merge branch 'master' into version_1
add a second readme2.txt
Merge branch 'master' into version_2
some changes to the first read me file
Merge branch 'version_2'
the changes in master branch
add some changes to README file on the version_2 branch
ignore the changes in master
Merge branch 'master' into version_1