Add testsuite.

Former-commit-id: bc34312dfef68bc81fc1257970786ea7b23ee99b

examples/counter.hs

@@ -0,0 +1,21 @@
+#!/usr/bin/env stack
+-- stack --resolver lts-13.14 runghc --package reanimate
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+module Main (main) where
+
+import           Control.Lens
+import           Data.Text (pack, Text)
+import Numeric
+
+import           Graphics.SvgTree hiding (Text)
+import           Reanimate.Driver (reanimate)
+import           Reanimate.LaTeX
+import           Reanimate.Monad
+import           Reanimate.Svg
+import           Reanimate.Signal
+
+main :: IO ()
+main = reanimate $ mkAnimation 2 $ do
+  s <- getSignal $ signalFromTo 0 (2*60-1) signalLinear
+  emit $ mkCircle (Num 0, Num 0) (Num s)