BloombergDLDataProvider - check existing first (#262)

Pdf exporter/enable image format selection (#240)

Fix waterfall chart limits and format (#232)

Add time convertion to DL (#229)

Updated the signatures of Exchagne Rate Provider and Tickers Universe…

… Provider (#219)

Adding unit tests for Bloomberg HistoricalDataProvider (#210)

Fixed typing.Sequence imports (#206)

Fix/improve documentation for users (#188)

Heatmap updated (#173)

API documentation (#154)

* Removed dic container from api documentation
* Updated Installation prerequisites