WCSTools Quick Installation

I know someone will ask me about this very soon,
so I write down my steps here:

• Visit http://tdc-www.harvard.edu/wcstools/
• Download the source code via http://tdc-www.harvard.edu/software/wcstools/wcstools-3.8.7.tar.gz
• Switch to ROOT, then copy the installing file to /usr/local/bin
• Unzipped it, removed the GZ file, and jumped into the new folder
• Run `make all`
• Edit your startup file (e.g: .profile) and insert the words below:
• export WCSTOOLS="/usr/local/bin/wcstools"
• export PATH="/usr/local/bin/wcstools/bin:$PATH"
• Restart your terminal and you will find those WCSTools commands :P

Enjoy it!