misc: update .gitignore to parity with boulder (#266)

Author: eggsampler

.gitignore

@@ -2,15 +2,21 @@
 *.o
 *.a
 *.so
+*.pyc
 
 # Folders
 _obj
 _test
+bin
+.gocache
 
 # Architecture specific extensions/prefixes
 *.[568vq]
 [568vq].out
 
+# Vim swap files
+*.sw?
+
 *.cgo1.go
 *.cgo2.c
 _cgo_defun.c
@@ -19,6 +25,15 @@ _cgo_export.*
 
 _testmain.go
 
+*.sw?
 *.exe
 *.test
 *.prof
+*.coverprofile
+
+tags
+
+# IDE support files
+.idea
+
+.vscode/*