Reduced all invalid extension messages on web server
Node adds an app folder in front of the main directory
Change name of variable of minimax results filename and move from config folder to tmp folder for writing issues on heroku
Added tmp folder for writing and modifying files
Updated folder for minimax results on gitignore
Change html title
Use dummy url for working with D3's json function, as now json contents will be sent to directly (without the file as middleware)
Directly send json to d3 loader to render the tree, instead of using the file as intermediary