add gtod post

Author: gonsie

_posts/2019-10-22-gtod.md

@@ -0,0 +1,9 @@
+---
+title: "Default Clock: Get-Time-of-Day"
+author: Elsa Gonsiorowski
+category: feature
+---
+
+With [PR #170](https://github.com/ross-org/ROSS/pull/170) there is a new default clock based on the system `gettimeofday` function.
+This means that ROSS can function on any architecture, even if a processor-specific system clock is not implemented.
+More details on the `gettimeofday` function can be found on the [linux man page](https://linux.die.net/man/2/gettimeofday).