Clean up trivial Eclipse warnings and fix whitespace.

Added @Override to overridden methods.
Removed unused imports.
Converted tabs to spaces.
Removed \r characters from end-of-lines.
Add .gitignore file to ignore the .class files that are
generated when the "gen" script is run.
diff --git a/opengl/tools/glgen/src/CodeEmitter.java b/opengl/tools/glgen/src/CodeEmitter.java
index 3e9b90a..ebb9727 100644
--- a/opengl/tools/glgen/src/CodeEmitter.java
+++ b/opengl/tools/glgen/src/CodeEmitter.java
@@ -1,8 +1,8 @@
-

-public interface CodeEmitter {

-

-    void setVersion(int version, boolean ext, boolean pack);

-    void emitCode(CFunc cfunc, String original);

-    void addNativeRegistration(String fname);

-    void emitNativeRegistration();

-}

+
+public interface CodeEmitter {
+
+    void setVersion(int version, boolean ext, boolean pack);
+    void emitCode(CFunc cfunc, String original);
+    void addNativeRegistration(String fname);
+    void emitNativeRegistration();
+}