Support batch processing for large project which has many git repositories.

You can use just 'run.at' script

$ run.at [target_directory_which_contains_git_repos]

EXAMPLES
========

$ run.at /home/woogon.shim/src/mega-project/
Add usage of batch script
Storing total modified files count of git to 'file-count' file.
Priotize top risky items among all repositories.

You can use, just, 'run.batch.at' script at the top of target project. It'll scan all repositories and run 'churn.ccn.analyzer.pl' script onto each git repository internally. And it'll gather all 'file_churn_complexity.csv' and sorted by churn (commits) and file complexity descending order. Finally it'll export top risky items to be reviewed or refactored to 'top_risk_files.csv'.
Renaming scan.at.pl to scan.all.repos.at.pl to represent clear meaning.
Modify README file
Removing global variable for using comparator.

By passing hash object parameter to comparator explicitly.
Collecting all 'churn-complexity.csv' file for all repos in a project and Generate chart as result.
Renaming shell script ext name
Remove 'target_dir' argument passing to und.file.complexity.pl.

Target_dir path could be extracted from databae path. So duplicated information was removed.
Add a script which retrieves all changed blocks of file since one month ago.

changed blocks are function in C, class in C++/Java, etc
Rename filename
Extract recently active authors and committers list at each file.
And change separator in csv file; ', ' => ',' (remove space after comma).
Generate churn-complexity chart for all git repos if data exists, automatically.
Modify 'prerequisite' section
Update project-level chart

repo 이름에 따라 legend 를 각기 달리하여 차트를 그리도록 수정함
Rename subroutine 'generate_project_level_chart'
minor change (typo)
Remove committer data.

In git, author and committer is same in normal case. Author and committer is different in case that author send a patch of their changes to someone has authority of committing central repository. (different author and committer is in Gerrit merge commit only)
Update README