Fix permissions of logs directory

The aloja-web/logs directory was mounted as 755 vagrant:vagrant, but PHP scripts are executed as www-data:www-data, which can't write to the log file and aborts the request.

Now the folder is mounted as 775 www-data:vagrant, so both users can modify the file (no more errors!).

Also, the file aloja_dev.log has been removed, because it was gitignore'd but still present in the repo, so changes were still tracked.
Merge pull request #3 from jcugat/fix-logs

Fix permissions of logs directory
Added structure and template for histogram view.
Function get_rows accepts parametrized querys
Load real data from database to the view
Modified table to add links to histogram view
Added option to group elements of histogram
Added option to show accumulated metrics