Add target to download and install Proj4js

.gitignore

@@ -11,6 +11,8 @@
 /build/src
 /build/phantomjs-*-windows
 /build/phantomjs-*-windows.zip
+/build/proj4js-*.zip
+/build/proj4js
 /examples/*.json
 /examples/*.combined.js
 /examples/example-list.js

build.py

@@ -77,6 +77,10 @@ SRC = [path
 PLOVR_JAR = 'bin/plovr-eba786b34df9.jar'
 PLOVR_JAR_MD5 = '20eac8ccc4578676511cf7ccbfc65100'
 
+PROJ4JS = 'build/proj4js/lib/proj4js-combined.js'
+PROJ4JS_ZIP = 'build/proj4js-1.1.0.zip'
+PROJ4JS_ZIP_MD5 = '17caad64cf6ebc6e6fe62f292b134897'
+
 
 def report_sizes(t):
     t.info('uncompressed: %d bytes', os.stat(t.name).st_size)
@@ -338,6 +342,17 @@ def hostexamples(t):
     t.cp('examples/example-list.js', 'examples/example-list.xml', 'examples/Jugl.js', 'build/gh-pages/%(BRANCH)s/examples/')
 
 
+@target(PROJ4JS, PROJ4JS_ZIP)
+def proj4js(t):
+    from zipfile import ZipFile
+    ZipFile(PROJ4JS_ZIP).extractall('build')
+
+
+@target(PROJ4JS_ZIP, clean=False)
+def proj4js_zip(t):
+    t.download('http://download.osgeo.org/proj4js/' + os.path.basename(t.name), md5=PROJ4JS_ZIP_MD5)
+
+
 if sys.platform == 'win32':
     @target('test', '%(PHANTOMJS)s', INTERNAL_SRC, 'test/requireall.js', phony=True)
     def test(t):