feature #62 Doctrine Migrations (Ricknox)

This PR was squashed before being merged into the master branch (closes #62).

Discussion
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Doctrine Migrations

This recipe adds doctrine migrations to the official Symfony recipes repository.

Commits
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52e1ebe Doctrine Migrations

doctrine/doctrine-migrations-bundle/1.2/etc/packages/doctrine_migrations.yaml

@@ -0,0 +1,2 @@
+doctrine_migrations:
+    dir_name: '%kernel.project_dir%/src/Migrations'

doctrine/doctrine-migrations-bundle/1.2/manifest.json

@@ -0,0 +1,10 @@
+{
+    "bundles": {
+        "Doctrine\\Bundle\\MigrationsBundle\\DoctrineMigrationsBundle": ["all"]
+    },
+    "copy-from-recipe": {
+        "etc/": "%ETC_DIR%/",
+        "src/": "%SRC_DIR%/"
+    },
+    "aliases": ["doctrine-migrations", "migrations"]
+}