Issue #283: log bad API calls to logs/api-errors.log with Monolog
- new INSTALL_ROOT/logs folder to store logs
- API errors are logged in api-errors.log
- The general logging file is now at logs/transvision.log
- Monolog library updated to 1.10
- bash scripts no longer create transvision.log because Monolog will create it if it doesn't exist
- logs folder in .gitignore
Merge pull request #284 from pascalchevrel/issue-283-log-API-errors-with-Monolog

Issue #283: log bad API calls to logs/api-errors.log with Monolog