Build with node 4, 5 and 6 and install requirements

.travis.yml

@@ -1,4 +1,4 @@
-# Copyright (c) 2013-2016 Martin Donath <martin.donath@squidfunk.com>
+# Copyright (c) 2016 Martin Donath <martin.donath@squidfunk.com>
 
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to
@@ -23,8 +23,9 @@ sudo: false
 
 # Node.js versions
 node_js:
-  - 4.5.0
-  - 6.7.0
+  - 4
+  - 5
+  - 6
 
 # Update GCC to 4.8 to build Gemini
 addons:
@@ -37,6 +38,7 @@ addons:
 
 # Install dependencies
 before_script:
+  - pip install -r requirements.txt
   - npm install
 
 # Perform build and tests

requirements.txt

@@ -0,0 +1,22 @@
+# Copyright (c) 2016 Martin Donath <martin.donath@squidfunk.com>
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+pygments
+pymdown-extensions