Fixed 'pool should run scripts on non blocking instances'-test timeout.
Added possibility to use JavaScript strict mode, when running scripts.

Conflicts:
	lib/sandcastle.js
	test/sandcastle-test.js
Added notEqual-function require.
Added memory limit for sandbox process.
Minor cleanup.
Merged feature-pool.
Merging back strict mode sync.

Conflicts:
	lib/sandcastle.js
	test/sandcastle-test.js
Merge branch memory-limit sync.