Compile remaining cflow examples

[mbheinen]

There are several programs written using the libcflow C API library that IPF provides. These can be found in the cflow folder of the project. Some of them are already compiled on normal make command but several aren't. This issue is for adding them, testing them, and adding test case to CI for them:

• six: Solution and Input eXtraction
• alt_load: Separate bus loads from transformer losses
• capcurve: Generate capacitor reactance-voltage curves. (not sure how this differs from qvcurve)
• cflowspeed: Read records from a case as fast as possible and times how long it takes. (might be a good perf CI test in the future)
• cfuse: Automate generation of user analysis reports.
• comp_soln: Compares bus solution voltages of two solved cases.
• d_loss: Generates a table of losses versus parameter for a specified line.
• dxloss: Generates a table of losses versus reactance for a specified line.
• increm: Creates an incremental line flow listing of selected lines, sorted by areas.
• pam: (Power Angle Monitor) Generates reports detailing the system power angle at key points
• post_pvcurve: Post processes P-V curve data files, selecting the most critical outage studies and rendering the output into an excel-importable data file.
• see_nodes: Prints differences in two solution cases
• solver_intact: Find the power generated at two specified buses which results in the 100% loading of the line connecting the two buses.