Merge pull request #4 from liuruiyiyang/fix_fixed_JAVA_HOME_bug

Polish existing scripts and docs
diff --git a/.github/ISSUE_TEMPLATE/issue_template.md b/.github/ISSUE_TEMPLATE/issue_template.md
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+---
+name: ISSUE_TEMPLATE
+about: Describe this issue template's purpose here.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+The issue tracker is **ONLY** used for bug report(feature request need to follow [RIP process](https://github.com/apache/rocketmq/wiki/RocketMQ-Improvement-Proposal)). Keep in mind, please check whether there is an existing same report before your raise a new one.
+
+Alternately (especially if your communication is not a bug report), you can send mail to our [mailing lists](http://rocketmq.apache.org/about/contact/). We welcome any friendly suggestions, bug fixes, collaboration and other improvements.
+
+Please ensure that your bug report is clear and that it is complete. Otherwise, we may be unable to understand it or to reproduce it, either of which would prevent us from fixing the bug. We strongly recommend the report(bug report or feature request) could include some hints as the following:
+
+**BUG REPORT**
+
+1. Please describe the issue you observed:
+
+- What did you do (The steps to reproduce)?
+
+- What did you expect to see?
+
+- What did you see instead?
+
+2. Please tell us about your environment:
+
+3. Other information (e.g. detailed explanation, logs, related issues, suggestions how to fix, etc):
+
+**FEATURE REQUEST**
+
+1. Please describe the feature you are requesting.
+
+2. Provide any additional detail on your proposed use case for this feature.
+
+2. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have). Are you currently using any workarounds to address this issue?
+
+4. If there are some sub-tasks using -[] for each subtask and create a corresponding issue to map to the sub task:
+
+- [sub-task1-issue-number](example_sub_issue1_link_here): sub-task1 description here, 
+- [sub-task2-issue-number](example_sub_issue2_link_here): sub-task2 description here,
+- ...
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+## How To Contribute
+
+We are always very happy to have contributions, whether for trivial cleanups or big new features.
+We want to have high quality, well documented codes for each programming language, as well as the surrounding [ecosystem](https://github.com/apache/rocketmq-externals) of integration tools that people use with RocketMQ.
+
+Nor is code the only way to contribute to the project. We strongly value documentation, integration with other project, and gladly accept improvements for these aspects.
+
+## Contributing code
+
+To submit a change for inclusion, please do the following:
+
+#### If the change is non-trivial please include some unit tests that cover the new functionality.
+#### If you are introducing a completely new feature or API it is a good idea to start a [RIP](https://github.com/apache/rocketmq/wiki/RocketMQ-Improvement-Proposal) and get consensus on the basic design first.
+#### It is our job to follow up on patches in a timely fashion. Nag us if we aren't doing our job (sometimes we drop things).
+
+## Becoming a Committer
+
+We are always interested in adding new contributors. What we look for are series of contributions, good taste and ongoing interest in the project. If you are interested in becoming a committer, please let one of the existing committers know and they can help you walk through the process.
+
+Nowadays,we have several important contribution points:
+#### Wiki & JavaDoc
+#### RocketMQ SDK(C++\.Net\Php\Python\Go\Node.js)
+#### RocketMQ Connectors
+
+##### Prerequisite
+If you want to contribute the above listing points, you must abide our some prerequisites:
+
+###### Readability - API must have Javadoc,some very important methods also must have javadoc
+###### Testability - 80% above unit test coverage about main process
+###### Maintainability - Comply with our [checkstyle spec](style/rmq_checkstyle.xml), and at least 3 month update frequency
+###### Deployability - We encourage you to deploy into [maven repository](http://search.maven.org/)