zeppelin/docs/quickstart
1ambda 1c23f21388 [ZEPPELIN-2707][DOCS][HOTFIX] fix: broken image URLs in 0.8.0-SNAPSHOT doc
### What is this PR for?

fix: broken image URLs in 0.8.0-SNAPSHOT doc

using the path `/asset` (the absolute path) for image URLs is actually invalid. That's because each version has its own image directory. So they should use the relative path. `{{BASE_PATH}}`

```
➜  asf-zeppelin tree site | grep asset
├── assets # root asset, we shouldn't use it in versioned doc.
│   │   ├── assets
│   │   ├── assets
│   │   ├── assets
│   │   ├── assets
│   │   ├── assets
│   │   ├── assets
│   │   ├── assets
│   │   ├── assets
│   │   ├── assets
│       ├── assets
```

### What type of PR is it?
[Bug Fix]

### Todos
DONE

### What is the Jira issue?
[ZEPPELIN-2707](https://issues.apache.org/jira/browse/ZEPPELIN-2707)

### How should this be tested?

1. cd `docs/`
2. build: `bundle exec jekyll build --safe`
3. check whether links in `_site` include `/docs/0.8.0-SNAPSHOT` as prefix or not

### Screenshots (if appropriate)

#### Current
http://zeppelin.apache.org/docs/0.8.0-SNAPSHOT/usage/interpreter/overview.html

![image](https://user-images.githubusercontent.com/4968473/27685112-bcca5846-5d07-11e7-89bb-3965015cf5a5.png)

#### After

![image](https://user-images.githubusercontent.com/4968473/27685218-3490fad8-5d08-11e7-9133-0e148689986e.png)

### Questions:
* Does the licenses files need update? - NO
* Is there breaking changes for older versions? - NO
* Does this needs documentation? - NO

Author: 1ambda <1amb4a@gmail.com>

Closes #2450 from 1ambda/ZEPPELIN-2707/should-use-its-own-asset-directory and squashes the following commits:

fb70214a [1ambda] fix: Use its own asset dir
2017-06-30 10:33:01 +09:00
..
explore_ui.md [ZEPPELIN-2707][DOCS][HOTFIX] fix: broken image URLs in 0.8.0-SNAPSHOT doc 2017-06-30 10:33:01 +09:00
install.md [ZEPPELIN-2596] Improving documentation page 2017-06-23 17:44:13 +09:00
python_with_zeppelin.md [ZEPPELIN-2596] Improving documentation page 2017-06-23 17:44:13 +09:00
spark_with_zeppelin.md [ZEPPELIN-2596] Improving documentation page 2017-06-23 17:44:13 +09:00
sql_with_zeppelin.md [ZEPPELIN-2596] Improving documentation page 2017-06-23 17:44:13 +09:00
tutorial.md [ZEPPELIN-2596] Improving documentation page 2017-06-23 17:44:13 +09:00