Temporarily remove .gitattributes.
Implement T4 template support to generat unit classes based on Unit enum values tagged with attributes.
* Using wildcards in .csproj files to automatically load files.
* Fixed all tests, mostly due to improved precision of constants and not using Delta.
* Added ToString() to vectors.
* In test code, disabled build warning CS1718: Comparison made to same variable; did you mean to compare something else?

BREAKING BACKWARDS COMPATIBILITY
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* Fixed case and plural naming of units: Kilopascal, Megapascal, RevolutionPerSecond
Revert "Temporarily remove .gitattributes."

This reverts commit 1127fb70e8ea99d4135fcc4ef9aa2d019a352837.