Consolidate parsing examples to one how-to

Author: kdayday

docs/make.jl

@@ -17,8 +17,7 @@ pages = OrderedDict(
         "How to..." =>  Any[
             "...install PowerSystems.jl" => "how_to/install.md",
             "...load a `system` from `PowerSystemCaseBuilder`" => "how_to/powersystembuilder.md",
-            "...load a Matpower or PSSE file" => "how_to/parse_powerflow_cases.md",
-            "...parse tabular data" => "how_to/parse_tabular_data.md",
+            "...parse data from Matpower, PSSE, or CSV files" => "how_to/parsing.md",
             "...add time series data from CSVs" => "how_to/add_ts_from_csvs.md",
             "...customize the tabular data parser" => "how_to/extend_tabular_parsing.md",
             "...get all the buses in a system" => "how_to/get_buses.md",
@@ -39,8 +38,7 @@ pages = OrderedDict(
             "explanation/time_series.md",
             "explanation/example_dynamic_data.md",
             "explanation/cost_functions.md",
-            "explanation/market_bid_cost.md",
-            "explanation/parsing.md",
+            "explanation/market_bid_cost.md"
             ],
         "Model Library" => Any[],
         "Reference" =>

docs/src/how_to/parse_powerflow_cases.md

@@ -80,5 +80,5 @@ If you are new to `PowerSystems.jl`, here's how we suggest getting started:
   - See [Creating a System with Dynamic devices](@ref) and the
       [tutorial in PowerSimulationsDynamics](https://nrel-sienna.github.io/PowerSimulationsDynamics.jl/stable/tutorials/tutorial_dynamic_data/)
       if you are interested in [dynamic](@ref D) simulations
-4. Then, see the how-to's on parsing [Matpower or PSS/e files](@ref parse_files) or
-    [CSV files](@ref tabular_parser) to begin loading your own data into `PowerSystems.jl`
+4. Then, see the how-to's on parsing [Matpower](@ref pm_data) or [PSS/e files](@ref dyr_data) or
+    [CSV files](@ref table_data) to begin loading your own data into `PowerSystems.jl`

docs/src/how_to/parse_tabular_data.md

@@ -329,7 +329,7 @@ and modified the `System` per-unit settings.
 Next, you might want to:
 - [Add time series data to components in the `System`](@ref tutorial_time_series)
 - [Learn more about how to retrieve components and their data from a `System`](@ref get_components_tutorial)
-- [Import a `System` from an existing Matpower or PSSE file instead of creating it manually](@ref parse_files)
-- [Create your own `System` from .csv files instead of creating it manually](@ref tabular_parser)
+- [Import a `System` from an existing Matpower or PSSE file instead of creating it manually](@ref parsing)
+- [Create your own `System` from .csv files instead of creating it manually](@ref table_data)
 - [Read more to understand per-unitization in PowerSystems.jl](@ref per_unit)