new README to describe the scripts

README.md

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 A collection of bash scripts helping on different git tasks
+
+## Scripts descriptions
+* gitcreatebranch (branch-name) - It creates a branch with branch-name on the remote, and then track the branch locally
+* delete_git_branch (branch-name) - It reverts what gitcreatebranch does (remove both remote and local branch)
+* gitci - Do a git diff and git status, asking if the user wants to continue given the information being presented. If the suer says Yes, the script will commit and push the changes