Changed Test Files to work with test data downloaded and saved in tmp folder.
Changed Extensions to be consistent (*.R)
Added runTestbed function which downloads data from Wiki,and runs Testbed
Additionally, recent changes were made to minc2_model's interface to allow
passing of filesnames on the RHS and LHS when using the lm functions.
Other functions which rely on minc2_model had to have their respective calls
modified to be compatible. Finally, an additional check was added when parsing
formulae, to only check for terms that belong to the input gf to avoid errors
when symbols like '*' appear.
The Recent changes to minc2_model resulted in the wrong arguement being passed
when non-lm methods were being invoked, and this bug was fixed.

Additionally an extra Unprotect  to prevent stack imbalances
Updated man pages to cover functions that are also covered by test bed.
-Added vertexSummary, and anatSummary functions
-Fixed bug in parseLmFormula where wrong variable (gf) was being referenced
-Addition of roxygen2 style comments
Removal of unnecessary output
The test did not work when the data was downsampled, so a new defs file had to be created
and the test cases changed appropriately
There was a bug in the test case whereby all the vertex indices were off by one.
Addition of new test cases for new summary functions
Added check to prevent crashing when CIVET GI files were only partially written
Fixed bug where White and Mid GI column names were flipped
Fixed bug where Vertices were misaligned by one index when Creating Brainview Files
Added labels to brain volume
Added new summary functions to NAMESPACE
Make sure environment is clear before running Testbed
Remove mincSummary from RMINC-internal