GitLab

- add option no sandbox
- add support for running into docker
- add option sendSyncDefaultTimeout
- add option prescript
- fix user agent setting

Add page options as a parameter and add ability to have a preScript for all pages. Useful if you want to define the same objects on all pages. A good example is to make chrome headless undetectable. Will add comment

Add option 'sendSyncDefaultTimeout' that will allow changing the default sync timeout. Sometimes it's needed for more than 3 seconds

fix #33

fix #32

#4

fixed minor typos

and page loading

Fix #20