Create ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

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+## Expected Behavior
+
+
+## Actual Behavior
+Screenshots and error messages are helpful.
+
+## Steps to Reproduce the Problem
+
+  1.
+  1.
+  1.
+
+## Specifications
+
+### Server
+  - OS (e.g., Mac OS X 10.12.6):
+  - Java (e.g., Oracle JDK 8u151):
+  - Servlet container (e.g., Apache Tomcat 8.5.20):
+  - webSpoon (e.g., version: 0.8.0.13 or commitId: 0211d84b):
+
+### Client
+  - OS (e.g., Mac OS X 10.12.6):
+  - Browser (e.g., Google Chrome 64.0.3282.140):