Changelog

master

(#87) Added aggregated read of parameter
(#86) Made top level of region explicit, rather than allowing access via () and made requests robust to string inputs
(#92) Updated installation to remove notebook dependencies from minimum requirements as discussed in #90
(#85) Split out submodule for ScmDataFrameBase openscm.scmdataframebase to avoid circular imports
(#83) Rename OpenSCMDataFrame to ScmDataFrame
(#78) Added OpenSCMDataFrame
(#35) Add units module
(#44) Add timeframes module
(#40) Add parameter handling in core module