From 'develop' of https://github.com/freqtrade/freqtrade into nullart/maindev

freqtrade/__init__.py

@@ -0,0 +1,25 @@
+""" FreqTrade bot """
+__version__ = '0.17.1'
+
+
+class DependencyException(BaseException):
+    """
+    Indicates that a assumed dependency is not met.
+    This could happen when there is currently not enough money on the account.
+    """
+
+
+class OperationalException(BaseException):
+    """
+    Requires manual intervention.
+    This happens when an exchange returns an unexpected error during runtime
+    or given configuration is invalid.
+    """
+
+
+class TemporaryError(BaseException):
+    """
+    Temporary network or exchange related error.
+    This could happen when an exchange is congested, unavailable, or the user
+    has networking problems. Usually resolves itself after a time.
+    """