Various logging fixes (#164)

Various logging fixes:
* imported the ObjCWrapper and updated the MXLogger. Also added back support for app containers
* updated MXLog.swift from El and fixed/improved its logging format
* updated most app log strings
* Remove unnecessary swiftlint rule
* Various tweaks following code review
* Added back type annoation on MXLogger logFiles method
* Fix generated Swift-ObjC header name

ElementX/Sources/Screens/BugReport/BugReportCoordinator.swift

@@ -57,10 +57,10 @@ final class BugReportCoordinator: Coordinator, Presentable {
     // MARK: - Public
     
     func start() {
-        MXLog.debug("[BugReportCoordinator] did start.")
+        MXLog.debug("Did start.")
         bugReportViewModel.callback = { [weak self] result in
             guard let self = self else { return }
-            MXLog.debug("[BugReportCoordinator] BugReportViewModel did complete with result: \(result).")
+            MXLog.debug("BugReportViewModel did complete with result: \(result).")
             switch result {
             case .submitStarted:
                 self.startLoading()

ElementX/Sources/Screens/BugReport/BugReportViewModel.swift

@@ -47,10 +47,10 @@ class BugReportViewModel: BugReportViewModelType, BugReportViewModelProtocol {
                                                                     includeCrashLog: true,
                                                                     githubLabels: BuildSettings.bugReportGHLabels,
                                                                     files: files)
-            MXLog.info("[BugReportViewModel] submitBugReport succeeded, result: \(result.reportUrl)")
+            MXLog.info("SubmitBugReport succeeded, result: \(result.reportUrl)")
             callback?(.submitFinished)
         } catch {
-            MXLog.error("[BugReportViewModel] submitBugReport failed: \(error)")
+            MXLog.error("SubmitBugReport failed: \(error)")
             callback?(.submitFailed(error: error))
         }
     }