remove checked-in pubspec.lock and ignore .packages

pkgs/package_config/.gitignore

diff --git a/pkgs/package_config/.gitignore b/pkgs/package_config/.gitignore
index f48e3c9..b46f3df 100644
--- a/pkgs/package_config/.gitignore
+++ b/pkgs/package_config/.gitignore
@@ -4,4 +4,5 @@
 build
 .project
 .settings
-pubspec.lock
\ No newline at end of file
+pubspec.lock
+.packages

pkgs/package_config/pubspec.lock

diff --git a/pkgs/package_config/pubspec.lock b/pkgs/package_config/pubspec.lock
deleted file mode 100644
index 5cae005..0000000
--- a/pkgs/package_config/pubspec.lock
+++ /dev/null
@@ -1,87 +0,0 @@
-# Generated by pub
-# See http://pub.dartlang.org/doc/glossary.html#lockfile
-packages:
-  analyzer:
-    description: analyzer
-    source: hosted
-    version: "0.25.0+1"
-  args:
-    description: args
-    source: hosted
-    version: "0.13.0"
-  barback:
-    description: barback
-    source: hosted
-    version: "0.15.2+4"
-  charcode:
-    description: charcode
-    source: hosted
-    version: "1.1.0"
-  collection:
-    description: collection
-    source: hosted
-    version: "1.1.1"
-  crypto:
-    description: crypto
-    source: hosted
-    version: "0.9.0"
-  http_parser:
-    description: http_parser
-    source: hosted
-    version: "0.0.2+6"
-  matcher:
-    description: matcher
-    source: hosted
-    version: "0.12.0"
-  mime:
-    description: mime
-    source: hosted
-    version: "0.9.3"
-  path:
-    description: path
-    source: hosted
-    version: "1.3.5"
-  pool:
-    description: pool
-    source: hosted
-    version: "1.0.1"
-  pub_semver:
-    description: pub_semver
-    source: hosted
-    version: "1.2.0"
-  shelf:
-    description: shelf
-    source: hosted
-    version: "0.6.1+2"
-  shelf_static:
-    description: shelf_static
-    source: hosted
-    version: "0.2.2"
-  shelf_web_socket:
-    description: shelf_web_socket
-    source: hosted
-    version: "0.0.1+2"
-  source_span:
-    description: source_span
-    source: hosted
-    version: "1.1.2"
-  stack_trace:
-    description: stack_trace
-    source: hosted
-    version: "1.3.2"
-  string_scanner:
-    description: string_scanner
-    source: hosted
-    version: "0.1.3+1"
-  test:
-    description: test
-    source: hosted
-    version: "0.12.1"
-  watcher:
-    description: watcher
-    source: hosted
-    version: "0.9.5"
-  yaml:
-    description: yaml
-    source: hosted
-    version: "2.1.2"