Add some new assets and text

[tmr83]

Before having to drop a lot of things, I was working to update the manual for some new features. Here are some images I created then:

Icaravan.png

developing_your_economy.tex

\subsection{Cloning and Idle Caravans}

\index{caravans!clone}
\index{caravans!idle}

\textswab{\huge{I}}dle Caravans are indicated by a * symbol within the Trade Report. They are listed after your Caravans with an active route. Your total amount of idle Caravans is also displayed.

\begin{center}
	\includegraphics[width=0.8\textwidth]{Icaravan}
\end{center}

\subsubsection{How do I clone a Caravan’s route?}

Select the Caravan you want to clone by \textbf{Clicking} on it or by \textbf{Double-Clicking} on it in the Trade Report.  To the right of the Caravan within the Trade Report, a button will appear that resembles a "P". \textbf{Click} on this button to clone that Caravan.

Irequest_builder.png

buildings_workers_links.tex

\begin{wrapfigure}{r}{0.4\textwidth}
	\vspace{-20pt}
	\begin{center}
		\includegraphics[width=0.4\textwidth]{Irequest_builder}
	\end{center}
	\vspace{-20pt}
\end{wrapfigure}

If there is no Construction Worker in the building, a button resembling an "R" will show in place of the Hammer Icon. 

If you wish to request a Construction Worker come to a building, \textbf{Clicking} on it will order the closest Construction Worker to the building for repair if one sufficiently idle is available to send. 

Itrade.png

information_interface.tex

\section{Trade}

\index{trade!scroll}

\textswab{\huge{I}}nside this Scroll, you will see detailed the routing and loads of all of your Caravans and all of your Ships that are being used in Trade. \textbf{Double-Clicking} on a Caravan or a Trader in this menu will center your screen over it.

\begin{center}
	\includegraphics[width=0.75\linewidth]{Itrade}
\end{center}

You will also see information about all of your Markets, Factories, and Mines and similar information for Kingdoms that you have a trade treaty with, including which buildings are idle which are indicated by a * symbol.

Other features include sorting and filtering trade locations based on the map selected Caravan, setting stops, and copying trade routes.

I know the request builder button is different now, so that image will have to change. I am not sure about the others. Here are some example of the images and example text:

Some helpful suggestions from another contributor:

Last sentence says:
Click on this button to clone that Caravan.

Could say:
"Position your mouse over another Caravan in the Trade Scroll, and click the 'P' button to clone the selected route to the Caravan your mouse is over."

Could say:

"You will also see information for all your Markets, Factories, and Mines, and also the Markets of those you have a trade treaty. The report shows a summary of product and sales for each building, or whether the building is idle, meaning showing no recent activity. The buttons presented and selecting different Caravans will allow you to filter to the resource of your interest. If you have a Caravan selected (double-clicking on a Caravan in the trade report selects one), as shown on the right pane, the building list will be sorted based on distance from the Caravan."

[tmr83]

This image can be pushed immediately.

Irequest_builder.png

Edit: This image was included in a pull request: the3dfxdude#247

[tmr83]

The image Icaravan.png here is an updated version with the "P" button for easily cloning a caravan. And the image Itrade.png here is an updated version with the correct product icon.