v-2.0-updates

[danStich]

Need to implement significant updates to the package prior to submission of new models to peer review. These will include issues
#18, #22, #24, #38, #46, #47

These and other changes will include:
[x] Change watershed default value to FALSE because this will be used more commonly moving forward
[ ] Implementation of the downstream delay parameter
[ ] Implementation of truck & transport and user-facing arguments
[ ] Implementation of juvenile stocking at arbitrary locations in the watershed and user-facing arguments
[x] Implementation of seasonal passage performance standard specification or derivation
[x] Separation of adult and juvenile downstream dam survival and user-facing argument for downstream_juv
[x] Memory management and speed improvements (reduction of redundant object returns)
[ ] Ability to read upstream and downstream passage efficiencies from .csv files
[x] Ability to specify starting population size as number of spawners instead of age-1 fish
[ ] Implementation of Salmon Falls River model
[ ] Add watershed output toggle to models other than mohawkHudsonRiverModel()

[danStich]

Most of these issues were resolved in #49. I am leaving this open as a working wish-list

[danStich]

Oops, didn't mean to close it.