[Seaside] [Ann] TF-Login for Seaside 3.3 for Pharo 7

[Pierce Ng]

Hi all,

Apologies for the x-posting. As per subject, I've ported TF-Login to
Seaside 3.3 for Pharo 7.

To load, start with fresh Pharo 7 image:

    Metacello new 
        baseline: 'Seaside3'; 
        repository: 'github://SeasideSt/Seaside:v3.3.3/repository'; 
        load. 
        
    Metacello new 
        baseline: 'TFLogin'; 
        repository: 'github://PierceNg/TF-Login:pharo7/src'; 
        load.

The baseline doesn't load Seaside, in case you want to load it into an
image that already has Seaside. 

Start Test Runner and run the TF-Login tests. All 62 tests should pass.

Pierce