Misc fixes

* Updated build scripts to handle gitless environments a little
  better
* PDO shell plugin improvements
* More tests

.spark/build/package.sh

@@ -5,11 +5,13 @@ if [ ! -f spark.phar ]; then
     exit 1
 fi
 
-VERSION="$(git describe --tags)"
-PATH="$PWD/tools:$PATH"
+if [ -z "$VERSION" ]; then
+    VERSION="$(git describe --tags)"
+    PATH="$PWD/tools:$PATH"
+fi
 
 if [ -z "$VERSION" ]; then
-    echo "Could not parse version from git"
+    echo "Could not parse version from git. Export VERSION if you are building manually."
     exit 1
 fi
 

.spark/build/update-version.sh

@@ -12,7 +12,7 @@ VERSION="$(git describe --tags)"
 
 if [ -z "$VERSION" ]; then
     echo "Could not parse version from git"
-    exit 1
+    exit 0
 fi
 
 echo -e "<?php define(\"APP_VERSION\", \"$VERSION\");" > src/version