Update plotting functions and analyses for summer harvest model

[ChloeRN]

Functions in need of updating:

• [x] plotIPM_basicOutputs
• [x] extractParamSamples
• [x] calculateSensitivities
• [x] plotSensitivities
• [x] runLTRE_randomDesign
• [x] plotLTRE_randomDesign
• [x] runLTRE_fixedDesign
• [x] plotLTRE_fixedDesign

[ChloeRN]

plotIPM_basicOutputs updated in 62b3087033b508745df72ccd44049355c1dc62af.

[ChloeRN]

Completed with #61