Add '--color=never' to 'ls' command to repress output with escaped string for color terminal.
Fix the issue of versioncheck.install_ucsc_tools(), add checking of no library installed.
Merge pull request #147 from ny-shao/master

Add '--color=never' to 'ls' command to repress output with escaped strin...
Fix all color 'ls' output issues in make_copy().
Merge pull request #149 from ny-shao/master

Fix all color 'ls' output issues in make_copy().