Trim and move README into HltEfficiencyChecker

HltEfficiencyChecker/README.md

+## Using HltEfficiencyChecker
+
+Full up-to-date documentation, including how to build and run `HltEfficiencyChecker` with a series
+of examples, can be found in the Moore online documentation [here](https://lhcbdoc.web.cern.ch/lhcbdoc/moore/master/tutorials/hltefficiencychecker.html).

README.md

-# MooreAnalysis
-
-MooreAnalysis is a simple project that brings together the runtime
-environment of Moore and Analysis. It hosts code for configuration
-of jobs used to measure physics performance and contains scripts
-for the analysis of the output of such jobs.
-The actual configuration of the benchmarked application is in Moore
-while the components used for writing out the numbers (tuple tools)
-are in Analysis.
-
-## How to build MooreAnalysis
-
-First of all, you need to get an LHCb software stack, as per the instructions
-[here](https://gitlab.cern.ch/rmatev/lb-stack-setup/). The necessary project
-repositories will be cloned automatically.
-
-With the configuration now set up, return to the terminal build the project as per the
-instructions in `lb-stack-setup` (link above). When you hit `make MooreAnalysis`, all
-the necessary projects will be cloned and compiled, although compilation will probably
-take awhile. You should then be able to start
-using the tools!
-
-## Using HltEfficiencyChecker
-
-Full up-to-date documentation, including how to build and run `HltEfficiencyChecker` with a series
-of examples, can be found in the Moore online documentation [here](https://lhcbdoc.web.cern.ch/lhcbdoc/moore/master/tutorials/hltefficiencychecker.html).
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