Syntax proposal test cases for in-memory YARRRML.
IMTC001: Pandas dataframe as source
IMTC002: Pandas dataframe as source without specifying software characteristics
IMTC003: Pandas dataframe as source without specifying software characteristics - short version
IMTC004: Python dictionary as source
IMTC005: Python dictionary as source without specifying software characteristics - short version
IMTC006: Multiple Pandas dataframes as sources
IMTC007: Multiple Python dictionaries as sources
IMTC008: Combination of in-memory and localy stored source