fix: Move varWarn to and unit test that all FunctionNode's use it

fix: Test that getExtension is set to be able to use on TravisCI
fix: Remove wraparound, is no longer being used anywhere
fix: add getMemoryOptimizedPackedTextureSize to string kernel
fix: Remove console.log() usage
fix: Move addFunction functionality into new utils method `functionToIFunction`
fix: Fix mergeSettings to use `functions` settings and use `functionToIFunction`
fix: Remove the spread operator for now, for compatibility with safari
fix: Add typings for `setFunctions`
fix; Failing unit tests for sarafi
feat: Add CONTRIBUTING.md
feat: Add ISSUE_TEMPLATE.md
fix: Remove typescript from dependencies
fix: Document, document, document
fix: Bump version and build

Author: robertleeplummerjr

CONTRIBUTING.md

@@ -0,0 +1,7 @@
+Thanks for taking the time to contribute to gpu.js. Follow these guidelines to make the process smoother:
+
+1. One feature per pull request. Each PR should have one focus, and all the code changes should be supporting that one feature or bug fix. Using a [separate branch](https://guides.github.com/introduction/flow/index.html) for each feature should help you manage developing multiple features at once.
+
+2. Follow the style of the file when it comes to syntax like curly braces and indents.
+
+3. Add a test for the feature or fix, if possible. See the `test` directory for existing tests and README describing how to run these tests.

ISSUE_TEMPLATE.md

@@ -0,0 +1,20 @@
+<!-- If you don't mind add a fun gif or meme, but no pressure -->
+![A GIF or MEME to give some spice of the internet](url)
+
+## *What* is wrong?
+<!-- Ex. run takes really long -->
+
+## *Where* does it happen?
+<!-- Ex. In GPU.js when trying to run a math function in node.js on my mac -->
+
+## *How* do we replicate the issue?
+<!-- Please be specific as possible. Use dashes (-) or numbers (1.) to create a list of steps -->
+
+## *How* important is this (1-5)?
+<!-- On a scale from 1-5 where 5 is the most important how would you rate it? -->
+
+## Expected behavior (i.e. solution)
+<!-- What do you think should have happened? -->
+
+
+## Other Comments