minor touch ups to the data and readme markdown files

Author: ccoffrin

DATA.md

@@ -47,7 +47,6 @@ The network data dictionary structure is roughly as follows,
 
 The following commands can be used to explore the network data dictionary generated by a given Matpower data file,
 ```
-using PowerModels
 network_data = PowerModels.parse_file("$(Pkg.dir("PowerModels"))/test/data/case14.m")
 display(network_data)
 ```
@@ -58,12 +57,13 @@ For a detailed list of all possible parameters refer to the specification docume
 
 The PowerModels network data dictionary differs from the Matpower format in the following ways,
 
-* All PowerModels components have an `index` parameter, which can be used to uniquely identify that network element.
-* All network parameters are in per-unit and angles are in radians.
-* All non-transformer branches are given nominal transformer values (i.e. a tap of 1.0 and a shift of 0).
-* When present, the `gencost` data is incorporated into the `gen` data, the column names remain the same.
-* Only quadratic active power generation cost functions are supported at this time.
-* Some additional derived values are added to branches, such as line admittance values (see `src/core/data.jl` for details).
+- All PowerModels components have an `index` parameter, which can be used to uniquely identify that network element.
+- All network parameters are in per-unit and angles are in radians.
+- All non-transformer branches are given nominal transformer values (i.e. a tap of 1.0 and a shift of 0).
+- When present, the `gencost` data is incorporated into the `gen` data, the column names remain the same.
+- Only quadratic active power generation cost functions are supported at this time.
+- Some additional derived values are added to branches, such as line admittance values (see `update_derived_values` in `src/core/data.jl` for details).
+- Special treatment is given to the optional `ne_branch` matrix to support the TNEP problem.
 
 
 ## Working with Matpower Data Files

README.md

@@ -37,7 +37,7 @@ For the current development version, "checkout" this package with,
 
 `Pkg.checkout("PowerModels")`
 
-At least one solver is required for running PowerModels.  The open-source solver Ipopt is recommended, as it is extremely fast, and can be used to solve a wide variety of the problems and network formulations provided in PowerModels.  The Ipopt solver can be installed via tha package manager with,
+At least one solver is required for running PowerModels.  The open-source solver Ipopt is recommended, as it is extremely fast, and can be used to solve a wide variety of the problems and network formulations provided in PowerModels.  The Ipopt solver can be installed via the package manager with,
 
 `Pkg.add("Ipopt")`
 
@@ -73,7 +73,7 @@ Extending PowerModels with new problems and formulations will be covered in a an
 
 ### Modifying Network Data
 
-The follow example demonstrates how to modify the network data in Julia.
+The follow example demonstrates how to perform multiple PowerModels solves while modify the network data in Julia,
 
 ```
 network_data = PowerModels.parse_file("nesta_case3_lmbd.m")