Update PV defaults, generator inputs bug fix, Float64 arg types to Real

• Update PV defaults to tilt=10 for rooftop, tilt = abs(lat) for ground mount, azimuth = 180 for northern lats, azimuth = 0 for southern lats.
• bug fix for Generator inputs to allow for time_steps_per_hour > 1
• change various Float64 argument types to Real to allow integers too

bug fix for outage_simulator with microgrid_only=true

v0.16.1

Merge branch 'develop'

v0.16.0 add offgrid capability, many name changes

Allows users to model "off-grid" systems as a year-long outage:

• add flag to "turn on" off-grid modeling Settings.off_grid_flag
• when off_grid_flag is "true", adjust default values in core/ electric_storage, electric_load, financial, generator, pv
• add operating reserve requirement inputs, outputs, and constraints based on load and PV generation
• add minimum load met percent input and constraint
• add generator replacement year and cost (for off-grid and on-grid)
• add off-grid additional annual costs (tax deductible) and upfront capital costs (depreciable via straight line depreciation)

Name changes:

• consistently append _before_tax and _after_tax to results names
• change all instances of timestep to time_step and timesteps to time_steps

Other changes:

• report previously missing lcc breakdown components, all reported in results/financial.jl
• change variable types from Float to Real to allow users to enter Ints (where applicable)
• year_one_coincident_peak_cost_after_tax is now correctly multiplied by (1 - p.s.financial.offtaker_tax_pct)

big fixes for 15 & 30 minute loads, fixed URDB charges

Merge pull request #53 from NREL/develop

bug fix URDB fixed charges

add AbsorptionChiller

v0.15.1

• add AbsorptionChiller technology
• add ElectricStorage.minimum_avg_soc_fraction input and constraint

bug fix in outage_simulator, add "_series" to "Outages" outputs that are arrays [breaking]

• bug fix in outage_simulator
• allow Real Generator inputs (not just Float64)
• add "_series" to "Outages" outputs that are arrays [breaking]

ElectricStorage degradation, API v2 cost default updates

• update default values from v2 of API [breaking]
• add ElectricStorage degradation accounting and maintenance strategies
• finish cooling loads

Storage->ElectricStorage, MPCLimits, ExistingBoiler, ExistingChiller, bug fixes

• fix bugs for time_steps_per_hour != 1
• add FlexibleHVAC model (still testing)
• start thermal energy storage modeling
• refactor Storage as ElectricStorage
• add ExistingBoiler and ExistingChiller
• add MPCLimits inputs:
  • grid_draw_limit_kw_by_time_step
  • export_limit_kw_by_time_step

v0.12.4 docs update (rm Lite)

• update docs
• prioritize urdb_response over urdb_label in ElectricTariff

v0.12.3 first REopt.jl release (aligned with REoptLite.jl v0.12.3)

REoptLite is being deprecated in favor of REopt. Version 1.0 of REopt will be released once all capabilities have been transferred from the REopt_Lite_API repository (which is being renamed to REopt_API).