Move economics images into img/

And flip the exe bit

book/src/ed_economic_sustainability.md

@@ -7,7 +7,7 @@ The dominant remittances from the Solana mining pool are validator and replicato
 The Replicator rewards are to be delivered to replicators from the mining pool after successful PoRep validation. The per-PoRep reward amount is determined as a function of the total network storage redundancy at the time of the PoRep validation and the network goal redundancy. This function is likely to take the form of a discount from a base reward to be delivered when the network has achieved and maintained its goal redundancy. An example of such a reward function is shown in **Figure 3**
 
 <!-- ![image alt text](porep_reward.png) -->
-<p style="text-align:center;"><img src="porep_reward.png" alt="==PoRep Reward Curve ==" width="800"/></p>
+<p style="text-align:center;"><img src="img/porep_reward.png" alt="==PoRep Reward Curve ==" width="800"/></p>
 
 **Figure 3**: Example PoRep reward design as a function of global network storage redundancy.
 

book/src/ed_overview.md

@@ -11,6 +11,6 @@ Transaction fees are market-based participant-to-participant transfers, attached
 A high-level schematic of Solana’s crypto-economic design is shown below in **Figure 1**. The specifics of validation-client economics are described in sections: [Validation-client Economics](ed_validation_client_economics.md), [State-validation Protocol-based Rewards](ed_vce_state_validation_protocol_based_rewards.md), [State-validation Transaction Fees](ed_vce_state_validation_transaction_fees.md) and [Replication-validation Transaction Fees](ed_vce_replication_validation_transaction_fees.md). Also, the chapter titled [Validation Stake Delegation](ed_vce_validation_stake_delegation.md) closes with a discussion of validator delegation opportunties and marketplace. The [Replication-client Economics](ed_replication_client_economics.md) chapter will review the Solana network design for global ledger storage/redundancy and replicator-client economics ([Storage-replication rewards](ed_rce_storage_replication_rewards.md)) along with a replicator-to-validator delegation mechanism designed to aide participant on-boarding into the Solana economy discussed in [Replication-client Reward Auto-delegation](ed_rce_replication_client_reward_auto_delegation.md). The [Economic Sustainability](ed_economic_sustainability.md) section dives deeper into Solana’s design for long-term economic sustainability and outlines the constraints and conditions for a self-sustaining economy. Finally, in chapter [Attack Vectors](ed_attack_vectors.md), various attack vectors will be described and potential vulnerabilities explored and parameterized.
 
 <!-- ![img alt text](solana_economic_design.png) -->
-<p style="text-align:center;"><img src="solana_economic_design.png" alt="== Solana Economic Design Diagram ==" width="800"/></p>
+<p style="text-align:center;"><img src="img/solana_economic_design.png" alt="== Solana Economic Design Diagram ==" width="800"/></p>
 
 **Figure 1**: Schematic overview of Solana economic incentive design.

book/src/ed_vce_state_validation_protocol_based_rewards.md

@@ -39,7 +39,7 @@ Over time, the interest rate, at any network staked percentage, will drop as des
 
 <!-- ![== Validation Client Interest Rates Figure ==](validation_client_interest_rates.png =250x) -->
 
-<p style="text-align:center;"><img src="validation_client_interest_rates.png" alt="drawing" width="800"/></p>
+<p style="text-align:center;"><img src="img/validation_client_interest_rates.png" alt="drawing" width="800"/></p>
 
 **Figure 2:** In this example schedule, the annual interest rate [%] reduces at around 16.7% per year, until it reaches the long-term, fixed, 4% rate.