review assembly loading in the project importer and visual studio addin
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                 Key: NPANDAY-464
                 URL: https://issues.apache.org/jira/browse/NPANDAY-464
             Project: NPanday
          Issue Type: Task
          Components: Project Importer, Visual Studio Add-in
    Affects Versions: 1.4.1-incubating
            Reporter: Brett Porter
             Fix For: Backlog


In this code, there are several instances of:
- Assembly.Load*
- Assembly.ReflectionOnlyLoad
- AppDomain.CurrentDomain.Load

These can be problematic because they load everything into the current domain 
of the visual studio addin and may cause a problem over the life of the 
application (either by memory usage, or by conflicting with other paths). For 
example, trying to use ReflectionOnlyLoadFrom with two different paths had 
caused a problem in NPANDAY-445, as the references appeared in {{c:\program 
files\reference assemblies}} but others appeared in the GAC.

Conversely, there is a lot of use of the {{gacutil}} output to figure out what 
is in the GAC instead of using the above.

Instances of either that aren't needed should be avoided (e.g. by reducing the 
need to distinguish which type of GAC is used - see NPANDAY-255). In others 
they should be rationalised to a single location, and preferably loaded into a 
separate domain that can be disposed of when no longer needed (or the 
information gleaned without having to load the assembly in the first place).

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