IGV: Installed files are writable by group(!)

[HenrikBengtsson]

$ ls -la /home/hb/shared/software/CBI/IGV-2.12.3
total 88
drwxr-xr-x   3 hb hb  4096 Mar  4 15:25 .
drwxr-xr-x 122 hb hb  4096 Mar 15 21:45 ..
-rw-rw-r--   1 hb hb   671 Mar  4 15:25 igv.args
-rwxrwxr-x   1 hb hb  1041 Mar  4 15:25 igv.bat
-rwxrwxr-x   1 hb hb  1565 Mar  4 15:25 igv.command
-rwxrwxr-x   1 hb hb  1362 Mar  4 15:25 igv_hidpi.sh
-rwxrwxr-x   1 hb hb   872 Mar  4 15:25 igv-launcher.bat
-rwxrwxr-x   1 hb hb  1296 Mar  4 15:25 igv.sh
-rwxrwxr-x   1 hb hb   784 Mar  4 15:25 igvtools
-rwxrwxr-x   1 hb hb   756 Mar  4 15:25 igvtools.bat
-rwxrwxr-x   1 hb hb   746 Mar  4 15:25 igvtools_gui
-rwxrwxr-x   1 hb hb   722 Mar  4 15:25 igvtools_gui.bat
-rwxrwxr-x   1 hb hb   834 Mar  4 15:25 igvtools_gui.command
-rwxrwxr-x   1 hb hb   812 Mar  4 15:25 igvtools_gui_hidpi
-rw-rw-r--   1 hb hb 16573 Mar  4 15:25 igvtools_readme.txt
drwxr-xr-x   3 hb hb  4096 Mar  4 15:25 lib
-rw-rw-r--   1 hb hb  4392 Mar  4 15:25 readme.txt

[HenrikBengtsson]

This was fixed by #47