Calculate next run date, get last run date, run single task

[Koricz]

Added public methods to

• Get last run date
• Calculate next run date Implement method to get next run date and time for each task #43
• Run single task with Cronner itself + option to override defined period (forced run)

I have also prepared version for Nette 2.3.10, if you create new branch, I will create another PR

[stekycz]

I am sorry for the delay. This looks pretty good! However, I need more time to process it. Thanks!

You can send the version for Nette 2.3.10 as another PR and I will merge it as needed. to the new branch.

[jspetrak]

Hello @Koricz Bileto took over the project as it was developed for our internal use and we still use it. We plan to further maintain it. Before we release first version with new packages, I would like to merge your PR. Do you have any time to resolve the conflict?

[Koricz]

@jspetrak Hi, good to hear Cronner is not abandoned.
There are not just conflicts but also some additional changes like days in month are now supported, so this will need to be added to calculation of next run too. I will try to implement this, but not promising any near date because I am now quite busy :-(