Update .gitignore

Inspired by prometheus/common#202 Signed-off-by: beorn7 <beorn@grafana.com>

Author: beorn7

.gitignore

@@ -1,30 +1,27 @@
-# Compiled Object files, Static and Dynamic libs (Shared Objects)
-*.o
-*.a
-*.so
-
-# Folders
-_obj
-_test
-
 # Examples
-/examples/simple/simple
-/examples/random/random
+examples/simple/simple
+examples/random/random
 
-# Architecture specific extensions/prefixes
-*.[568vq]
-[568vq].out
+# Typical backup/temporary files of editors
+*~
+*#
 
-*.cgo1.go
-*.cgo2.c
-_cgo_defun.c
-_cgo_gotypes.go
-_cgo_export.*
+# Never include any accidentally created vendor dirs.
+# This is a library!
+vendor/
 
-_testmain.go
+# The remainder of this file is taken from
+# https://github.com/github/gitignore/blob/master/Go.gitignore
 
+# Binaries for programs and plugins
 *.exe
+*.exe~
+*.dll
+*.so
+*.dylib
 
-*~
-*#
-.build
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out