Updated g2lib link to newer version
Updated grads link to newer version
Updated vapor link to newer version
Updated zlib link to newer version
Updated libpng link to newer version
Added "--no-check-certificate" to avoid certificate error...
Updated WRF link to latest version.
Updated WPF link to latest version.
Merge pull request #7 from wxguy/master

Updated link to downloads...
ignore generated log files.
don't "make check" since it already takes lot of time to build.
build_app.sh: Download if app is not downloaded already.
Give feedback after successful built.
apps/JPEG.env: Change DIR name as well as version name
Put shebang to make sure script runs in bash.
add colour functions
start make use of color echo functions.
use more color messages.
Move env check to lib/fun.
make BASE and WRF_BASE same.