Revised tank model.

This is for #214.
Updated conversion script for revised tank model.

This is for #214.
Updated reference results.

This is for #214.
Merge branch 'master' into issue214_tankHex
Increased the tank height
Updated comment.

This is for #214
Updated reference results.

This is for #214.
Added figure.

This is for #214.
Improved documentation of weather data reader.

This closes #219. The documentation of ReaderTMY3 has been improved to clarify that the data are TMY3 data, but the format is EnergyPlus syntax that needs to be converted before the data are used.
Added UsersGuide for storage tank.
Added UsersGuide for storage tank.
Merge branch 'master' into issue214_tankHex
Merge pull request #217 from lbl-srg/issue214_tankHex

Issue214 tank hex