WalrusFileManager: getFileContent can now return a file portion
WalrusFileManager: improve getFileContent with more parameters (array or string return)
WalrusMonitoring: a function can be detected for each Exception type and trace
Walrus dev: templates & scripts for exception, need to check error + multiple exceptions
Walrus dev: Walrus toolbar (empty)
WalrusMonitoring: error display working
WalrusMonitoring: display comment block if they're found