CLIMATE-506, Find temporal overlap between models and obervations
CLIMATE-506, Find temporal overlap between models and obervations

To be able to add the multi obs/model functionality to OCW cli, there is need to find the temporal overlap between all datasets (models and observations).
If any dataset (model or observation) does not have overlap with other, it should be notifies to user.

pwcberry/climate,lewismc/climate,Omkar20895/climate,riverma/climate,MJJoyce/climate,jarifibrahim/climate,apache/climate,huikyole/climate,pwcberry/climate,pwcberry/climate,MBoustani/climate,Omkar20895/climate,kwhitehall/climate,agoodm/climate,Omkar20895/climate,Omkar20895/climate,jarifibrahim/climate,apache/climate,apache/climate,kwhitehall/climate,lewismc/climate,apache/climate,riverma/climate,apache/climate,MJJoyce/climate,Omkar20895/climate,agoodm/climate,agoodm/climate,huikyole/climate,riverma/climate,MBoustani/climate,kwhitehall/climate,lewismc/climate,MJJoyce/climate,kwhitehall/climate,riverma/climate,pwcberry/climate,MJJoyce/climate,jarifibrahim/climate,agoodm/climate,MBoustani/climate,lewismc/climate,MBoustani/climate,lewismc/climate,jarifibrahim/climate,huikyole/climate,jarifibrahim/climate,riverma/climate,agoodm/climate,MBoustani/climate,huikyole/climate,pwcberry/climate,huikyole/climate,MJJoyce/climate