Add integer large size regression test

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
stress test: long identifier

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
stress test: large string

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Merge pull request #24 from compudj/master

add stress tests