docs: update

.travis.yml

@@ -0,0 +1,17 @@
+language: bash
+sudo: required
+
+os:
+    - linux
+
+install:
+  # Install a custom version of shellcheck instead of Travis CI's default
+  - scversion="latest" # or "v0.4.7", or "latest"
+  - wget "https://storage.googleapis.com/shellcheck/shellcheck-${scversion}.linux.x86_64.tar.xz"
+  - tar --xz -xvf "shellcheck-${scversion}.linux.x86_64.tar.xz"
+  - shellcheck() { "shellcheck-${scversion}/shellcheck" "$@"; }
+
+script:
+    - shellcheck fff -e SC2244 -e SC1090 -e SC1091
+    # Check for lines longer than 80 chars.
+    - if grep '.\{81\}' pash; then (exit 1); else (exit 0); fi