style: fix README layout and add .vscode to .gitignore

.gitignore

@@ -10,3 +10,4 @@ yarn.lock
 /test/repo
 /.nyc_output
 /coverage
+.vscode

README.md

@@ -16,17 +16,17 @@ There is no pre-required monorepo style or folder structure.
 
 Things to check before gettings started:
 
-1.  Monorepo has correct 'repository' entry in package.json
-2.  Names in individual packages package.json file is correct (matches glob path). For example, a package in 'packages/@foo/bar' should have '@foo/bar' as name.
-3.  REPO_COOKER_GITHUB_TOKEN is set in the environment where the script runs.
-4.  .npmrc has an authToken (npm login) and REPO_COOKER_NPM_OTP is set if you have two factor authentication
-5.  git login if publishing release (see .travis.yml as example)
-6.  'latest' npm tag for packages already released use a semver version matching /^\d+.\d+\.
+1. Monorepo has correct 'repository' entry in package.json
+2. Names in individual packages package.json file is correct (matches glob path). For example, a package in 'packages/@foo/bar' should have '@foo/bar' as name.
+3. REPO_COOKER_GITHUB_TOKEN is set in the environment where the script runs.
+4. .npmrc has an authToken (npm login) and REPO_COOKER_NPM_OTP is set if you have two factor authentication
+5. git login if publishing release (see .travis.yml as example)
+6. 'latest' npm tag for packages already released use a semver version matching /^\d+.\d+\.
     (any version with appe)
 
 ## Usage examples
 
-_package.json_
+### `package.json`
 
 ```js
 {
@@ -51,7 +51,7 @@ _package.json_
 }
 ```
 
-_repo-cooker/index.js_
+### `repo-cooker/index.js`
 
 This is the settings file.
 
@@ -89,7 +89,7 @@ const cooker = Cooker(process.argv, {
 })
 ```
 
-_repo-cooker/publish.js_
+### `repo-cooker/publish.js`
 
 ```js
 import { cooker } from './'