Gitiles: Implement Buck driven build

Until extension system is released by Buck team [1], factor out
existing Buck building blocks as Bucklets in standalone git
repository and reuse it as Git submodule to implement Buck driven
build [2].

To build gitiles `gitiles` target is used:

  buck build gitiles

To build servlet, sources and javadoc in addition, `all` target is used:

  buck build all

that produces:

  buck-out/gen/gitiles.war
  buck-out/gen/servlet.jar
  buck-out/gen/src.jar
  buck-out/gen/javadoc.jar

To execute the tests:

  buck test --all

To generate eclipse project:

  bucklets/tools/eclipse.py

To fetch sources for all dependent libraries too:

  bucklets/tools/eclipse.py --src

To install gitiles-servlet into local Maven repository:

  buck build mvn_install

To deploy gitiles-servlet into remote Maven repository:

  buck build mvn_deploy

[1] http://stackoverflow.com/questions/16681527/buck-vs-gradle-pros-and-cons-for-android-build-systems
[2] https://gerrit.googlesource.com/bucklets

Change-Id: Ib824dac6423d69c298f9c30ed7a0c05b4d6447c0

gitiles-dev/BUCK

diff --git a/gitiles-dev/BUCK b/gitiles-dev/BUCK
new file mode 100644
index 0000000..b50f58b
--- /dev/null
+++ b/gitiles-dev/BUCK
@@ -0,0 +1,17 @@
+java_library(
+  name = 'dev',
+  srcs = glob(['src/main/java/**/*.java']),
+  deps = [
+    '//gitiles-servlet:servlet',
+    '//lib:guava',
+    '//lib/jgit:jgit',
+    '//lib/jgit:jgit-servlet',
+    '//lib/jetty:server',
+    '//lib/jetty:servlet',
+    '//lib/slf4j:slf4j-api',
+    '//lib/slf4j:slf4j-simple',
+    '//lib:servlet-api_3_0',
+    '//lib:soy',
+  ],
+  visibility = ['PUBLIC'],
+)