continue in monitor mode when sync timed out (#265)

* update handling of connection timeouts in monitor mode & allow application continue rather than exit

src/main.d

@@ -382,10 +382,15 @@ int main(string[] args)
 						online = false;
 					}
 					if (online) {
-						performSync(sync, singleDirectory, downloadOnly, localFirst, uploadOnly);
-						if (!downloadOnly) {
-							// discard all events that may have been generated by the sync
-							m.update(false);
+						try {
+							performSync(sync, singleDirectory, downloadOnly, localFirst, uploadOnly);
+							if (!downloadOnly) {
+								// discard all events that may have been generated by the sync
+								m.update(false);
+							}
+						} catch (CurlException e) {
+							// TODO better check of type of exception from Curl
+							log.log("No network connection to Microsoft OneDrive Service, skipping sync");
 						}
 					}
 					// performSync complete, set lastCheckTime to current time

src/onedrive.d

@@ -523,7 +523,7 @@ final class OneDriveApi
 		} catch (CurlException e) {
 			// Potentially Timeout was reached on handle error
 			log.error("\nAccess to the Microsoft OneDrive service timed out - Internet connectivity issue?\n");
-			exit(-1);
+			throw e;
 		}
 
 		JSONValue json;