Added pull request template

Author: mikecentola

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,22 @@
+## Thank you for contributing to VSCode-GCode-Syntax
+
+### Please create an issue _before_ creating a pull request
+
+### DESCRIPTION
+
+<!-- PUT GENERAL DESRIPTION OF PULL REQUEST HERE -->
+
+FIXES ISSUE # <!-- PUT ISSUE NUMBER HERE -->
+
+### CHECKLIST
+
+<!-- Please check off the following -->
+
+- [ ] I have read the guidelines in the [CONTRIBUTING](https://github.com/appliedengdesign/vscode-gcode-syntax/blob/master/CONTRIBUTING.md) document
+- [ ] My changes follow the coding style, have been formated & linted
+- [ ] My changes have a descripted commit message
+- [ ] My commits are GPG signed
+
+#### ADDITONAL NOTES
+
+<!-- Put any additional notes in here -->