make option to set time for checking mail

[fat0]

Right now it is hard coded to check every 30 seconds. Can you please make this an option that one can set in the config? Would greatly appreciate it :)

[rodcorsi]

Can you explain why do you need to change this time?

[fat0]

So I can change it to whatever value I feel like? It's not that important though. The ticket I opened next is more important, please let me know what you think: #40

[rodcorsi]

Today Mattermail use imap idle to check when new emails arrive.
The 30 seconds is used only if an error occurs and Mattermail will try again

[Ketchup31]

I am agree with fat0. I am newbie with mattermail but i have seen in matter that some const variables are declared. I tested mattermail on one imap mailbox which has a large number of mails. The fetch processing stopped as i guess that 4000 is teh maximum. (but maybe i am wrong). If we can set our values according to our needs we could use mattermail easier. By the way thank you for this plugin :-).