Issue 50 - User defined exit codes

[abozhilov]

Checkout tests https://github.com/abozhilov/slimerjs-exit

For the Windows .bat file I'm not sure how to implement exit status. Don't know if it even supported.

[laurentj]

By doing this, we will not know when there is a problem with Gecko. I think it is better to keep the "official" exit status code, and read the exitstatus file only if EXITCODE is 0.

[laurentj]

We should suppress the exitstatus file before launching slimerjs, else at the end we will read the status code of a previous launch in the case where the same profile is used, and there is no exit() call or there is a crash...

[masi]

In a batch file use EXIT /B [code].

[bensu]

I'm wondering if this PR made it into the latest release. Looking at the source for 0.9.6 it doesn't look like it did, even though the merge data < release date by a couple of months.

[laurentj]

@bensu no, only in the master branch

[bensu]

Thanks @laurentj ! I'll wait for the next release then.