Add modular80. Update version for Gratrix. (#357)

.gitmodules

@@ -173,3 +173,7 @@
 	path = repos/RODENTMODULES
 	url = https://github.com/RODENTCAT/RODENTMODULES
 	branch = master
+[submodule "repos/modular80"]
+	path = repos/modular80
+	url = https://github.com/cschol/modular80
+	branch = master

manifests/modular80.json

@@ -0,0 +1,8 @@
+{
+  "name": "modular80",
+  "author": "cschol",
+  "license": "BSD-3-Clause",
+  "manualUrl": "https://github.com/cschol/modular80/blob/master/README.md",
+  "sourceUrl": "https://github.com/cschol/modular80",
+  "latestVersion": "0.6.0"
+}

repos/Gratrix

@@ -1 +1 @@
-Subproject commit 1df86170a48f8e5396f0309a3533b633c7478d97
+Subproject commit d37bf723c94b3f16e7ad83641e3849ca7c8f653e

repos/modular80

@@ -0,0 +1 @@
+Subproject commit b2bed7171c55f73447e694a73bc0af175ad20fd6