Configure Travis to build shaders with glsl-unit

.gitignore

@@ -2,6 +2,7 @@
 /bin/plovr*.jar
 /build/gh-pages
 /build/check-requires-timestamp
+/build/glsl-unit
 /build/jsdoc-*-timestamp
 /build/lint-timestamp
 /build/ol.css

.travis.yml

@@ -1,10 +1,12 @@
 before_install:
   - "sudo pip install http://closure-linter.googlecode.com/files/closure_linter-latest.tar.gz"
   - "git clone https://github.com/jsdoc3/jsdoc && (cd jsdoc && git checkout master)"
+  - "git clone https://code.google.com/p/glsl-unit/ build/glsl-unit"
 
 before_script:
   - "./build.py plovr"
   - "./build.py serve-integration-test &"
+  - "rm src/ol/renderer/webgl/webgl*shader.js"
   - "sleep 3"
 
 script: "./build.py JSDOC=jsdoc/jsdoc integration-test"

build.py

@@ -39,7 +39,7 @@ else:
     variables.PYTHON = 'python'
     variables.PHANTOMJS = 'phantomjs'
 
-TEMPLATE_GLSL_COMPILER_JS = '../glsl-unit/bin/template_glsl_compiler.js'
+TEMPLATE_GLSL_COMPILER_JS = 'build/glsl-unit/bin/template_glsl_compiler.js'
 
 variables.BRANCH = output(
     '%(GIT)s', 'rev-parse', '--abbrev-ref', 'HEAD').strip()