Magellan should create directories recursively

[qacwnfq]

It would prevent errors like this:

> DPRO=local magellan --browser=phantomjs,firefox,chrome --temp_dir=${TEMP_DIR}|| true
[INFO] 
[INFO] Magellan 8.8.5
[INFO] Will try to load configuration from default of ./magellan.json
[INFO] Loaded configuration from:  repos/demo/integration-tests/src/test/magellan.json
[ERROR] repos/demo/integration-tests/src/test/node_modules/testarmada-magellan/src/mkdir_sync.js:10
[ERROR]       throw e;
[ERROR]       ^
[ERROR] 
[ERROR] Error: ENOENT: no such file or directory, mkdir 'repos/demo/integration-tests/target/frontend/temp'
[ERROR]     at Error (native)