Add pom.xml and zwc filetypes

pom.xml (Maven) is popularly used for Java projects, along with the
already existing build.xml (Ant) and build.gradle (Gradle) immediate
files.

zwc stands for Zsh Word Code and contains compiled Z Shell scripts or
functions.

src/info/filetype.rs

@@ -24,7 +24,7 @@ impl FileExtensions {
         file.name.ends_with(".ninja") ||
         file.name_is_one_of( &[
             "Makefile", "Cargo.toml", "SConstruct", "CMakeLists.txt",
-            "build.gradle", "Rakefile", "package.json", "Gruntfile.js",
+            "build.gradle", "pom.xml", "Rakefile", "package.json", "Gruntfile.js",
             "Gruntfile.coffee", "BUILD", "BUILD.bazel", "WORKSPACE", "build.xml",
             "webpack.config.js", "meson.build",
         ])
@@ -88,7 +88,7 @@ impl FileExtensions {
     }
 
     fn is_compiled(&self, file: &File) -> bool {
-        if file.extension_is_one_of( &[ "class", "elc", "hi", "o", "pyc" ]) {
+        if file.extension_is_one_of( &[ "class", "elc", "hi", "o", "pyc", "zwc" ]) {
             true
         }
         else if let Some(dir) = file.parent_dir {