Move screenshot to .github, add an ISSUE_TEMPLATE

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,49 @@
+<!--
+  Thanks for submitting an issue for vim-import-cost!
+
+  This is a template for reporting bugs or issues found in this plugin. Before submitting a bug
+  report, please make sure to update the plugin to the latest version and check if the bug is
+  persisted there.
+
+  If you're planning to suggest a feature or an improvement, feel free to delete this template :)
+
+  PLEASE NOTE that this plugin uses another package called `import-cost`, and the issue may be
+  related to it. Please check if the issue persist in the VS Code extension:
+
+    https://github.com/wix/import-cost
+
+  Also, please look through existing bug reports in both this and the `import-cost` projects.
+  -->
+
+## Information
+
+**Vim info**:
+
+```
+```
+
+<!-- Paste the first two lines of :version here -->
+
+Operating system: <!-- Describe your operating system version -->
+
+## Description
+
+<!--
+  Describe what went wrong, including the expected and the current behaviour.
+  You can also provide a screenshot if you'd like to.
+  -->
+
+## Minimal .vimrc
+
+<!-- Please provide a minimal verison of your .vimrc (or init.vim) file (less than 50 lines) -->
+
+```vim
+```
+
+## Steps to reproduce
+
+<!-- Write a list of steps below -->
+
+1. foo
+2. bar
+3. baz

README.md

@@ -2,7 +2,7 @@
 
 [![Build Status](https://travis-ci.org/yardnsm/vim-import-cost.svg?branch=master)](https://travis-ci.org/yardnsm/vim-import-cost)
 
-![](media/screenshot.png)
+![](.github/assets/screenshot.png)
 
 This plugin is a (very rough) port of the [import-cost](https://github.com/wix/import-cost) plugin
 for Visual Studio Code. In a nutshell, it calculates the bundle size for each `import` or `require`
@@ -17,8 +17,6 @@ module.
 You can find more information about how the size calculation process works in [this blog
 post](https://hackernoon.com/keep-your-bundle-size-under-control-with-import-cost-vscode-extension-5d476b3c5a76).
 
-> Note: this plugin is still a work-in-progress!
-
 ## Installation
 
 Use your favorite plugin manager to install this plugin. Make sure to have `node` (>= 8) and `npm`