notifications: restyling email templates #4087

user: hash email key for User.get_by_email() fixes #4132

db: always use Session() for compatibility, Using Session is actually the scoped_session which is not the same as the one which we "call". More here: http://docs.sqlalchemy.org/en/latest/orm/contextual.html#contextual-thread-local-sessions

setup: improve support for prompts, we should not take care of case sensitivity here

logging: Use __name__ when requesting a logger

auth: Fix renaming of 'auth_cahe_ttl' to 'cache_ttl' #4127

api: add a max_file_bytes parameter to get_nodes so that large files can be skipped

scm: change ._get_content() to .raw_bytes attribute to file nodes to allow getting raw bytes instead of text content of a file and added .md5 and .is_binary attributes to file nodes

docs: fixed docstring

auth-ldap: added flag to set debug mode for LDAP connections.