[tools] add .travis.yaml to do CI via travis.org

.travis.yml

@@ -0,0 +1,11 @@
+language: python
+python:
+- '2.7'
+- '3.6'
+before_install:
+  - pip install --upgrade pip
+install:
+  - pip install -r tools/requirements.txt
+script:
+  - python tools/util/google_fonts.py --nam_dir=tools/encodings
+  - python tools/util/filter_lists.py tools/encodings/GF\ Glyph\ Sets/

tools/requirements.txt

@@ -0,0 +1,3 @@
+fonttools
+google-apputils
+protobuf