Support for PUT/DELETE http methods

[GoogleCodeExporter]

Mongoose requires setting PUT_DELETE_PASSWORDS_FILE option (.htpasswd file with 
username/password), and later when performing PUT/DELETE request these 
credentials must be included in headers.

A new option in settings.json "put_delete_password_file" with two possible 
values:
a) A path to "/.htpasswd" file
b) Value of "no-password-file-required" - this would require modification in 
mongoose.c so that password is not required for PUT/DELETE requests.

See this topic for reference: 
https://groups.google.com/d/topic/phpdesktop/x5TPLUSdc4w/discussion

Original issue reported on code.google.com by czarek.t...@gmail.com on 31 Oct 2014 at 8:43