Update .gitignore

[michadasis]

Some folders shouldn't be pushed to the github repo (best example: .idea)

[michadasis]

I put "?" to some directories, because I'm unsure if they are vital to the app or not

[TolisSth]

.idea/ 
local_data/ 
__pycache__/ 

Are not vital and should be removed. Also a good idea is to rename local_data/ to .local_data/.