accept suppression of condition for conduction resistance in convectionResistance.mo, remove the flow dependency of singleUTubeResistances.mo and edit HexInternalElement.mo to remove the obsolete inputs of singleUTubeResistances
add review code information to the documentation
add "name" and "alpha" (diffusion constant) to BaseClasses.mo to make Buildings compatible with DaPModels
edit documentation + add calculation of beta in singleUTubeResistances.mo + add Images/Fluid/HeatExchangers/Boreholes/BaseClasses/Bauer_singleUTube.png
delete unused classes
Merge pull request #200 from damienpicard/issue196_borehole

Issue196 borehole