Integrate LZ4 library, compress the ramdisk

lz4/.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Expected behavior**
+Please describe what you expected to happen.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error '...'
+If applicable, add screenshots to help explain your problem.
+
+**System (please complete the following information):**
+ - OS: [e.g. Mac]
+ - Version [e.g. 22]
+ - Compiler [e.g. gcc]
+ - Build System [e.g. Makefile]
+ - Other hardware specs [e.g. Core 2 duo...]
+
+**Additional context**
+Add any other context about the problem here.