Possible little typos/inconsistencies in code and documentation

[enricoteofilo]

Hi. It's possible that the LeR class and the documentation both contain some typos/inconsistencies to each other.

Ones I've found:

• [x] in the LeR class a method is called rate_comparision_with_rate_calculationinstead of rate_comparison_with_rate_calculation as in the example in the documentation
• [x] in the documentation > Installation: when installing through a new conda environment, the new created environment is called ler2, and not ler as in the written instructions
• [x] in the documentation there are some references to the CompactBinaryPopulation class, which I think is not present in the code anymore and has been superceeded by CBCSourceParameterDistribution (but I may be wrong...)

[hemantaph]

Thanks for the comments

• I have it changed to 'rate_comparison_with_rate_calculation' in git and documentation. And I will update pypi after a couple of days.
• In the ler.yml file, ler2 is changed to ler
• all CompactBinaryPopulation text changed to CBCSourceParameterDistribution.