More flexibility using request options and bug fixes

[fela98]

There are 4 things in this PR:

• Add winser to easily run it as a windows service by runningnpm run install-windows-service
• Possibility to specify database, user, password and role on a per-request level.
• Added params option to send params along with the sql query for avoiding SQL injections.
• Fixed crash that occurred when a query does not return an array of objects.

[cfernandezGAD]

Hey can you take a look at my pull request, so maybe we can integrate some features from mine into yours( mainly the ability to add multiple databases in a single instance of firebird-rest)