Add some comments in .travis.yml

Author: PeterDaveHello

.travis.yml

@@ -5,6 +5,8 @@ git:
 
 matrix:
   include:
+
+# ShellCheck tests on generator and sh, ksh, bash dist files
   - env:
       - task=shellcheck
     script:
@@ -22,6 +24,7 @@ matrix:
     script:
       - shellcheck dist/ColorEcho.bash
 
+# test all echo functions on difference shell on Linux
   - env:
       - task=test-dist-sh
     script: