Unity x86 and x64 (n)makefiles.

Replace powershell build scripts and xml configuration with simpler
batch file with reasonable defaults that can be overriden.
Remove stale installer files
Better names for Wix files
Use short name to avoid need for msi edit
Remove unused scripts
No x bit
Move installer building to makefile and clean up wix files
Generalize test building to work against both x86 and x64
Less exec bits
Add arch back to odbc driver entry names
Consistent version hyphen
merge nathanlws: Build and package on x86

Merge pull request #36 from nathanlws/sql-layer-adapter-odbc/build-x86
https://github.com/FoundationDB/sql-layer-adapter-odbc/pull/36