build scripts fail within a path containing spaces;

If the main repository directory path contains a space, build scripts fail.
Fixed this issue by quoting commands which use a path.
added "" as a Title for the 'start' command;

According to http://ss64.com/nt/start.html,
it's recommended to always include a title with the 'start' command
(even if it's empty).  Also, without the "", GitEx would NOT start;
rather, a new command prompt instance would be started.
Merge branch 'masterg' into left-panel/-main
added ability to build using the build scripts;

Per http://docs.nuget.org/docs/workflows/using-nuget-without-committing-packages,
added ability to build the solution's projects which have NuGet
package dependencies.
added "set EnableNuGetPackageRestore=true";

"set EnableNuGetPackageRestore=true" is required for NuGet to restore
(download) packages which aren't in the \packages\ folder. Note that
some or all packages may be copied from a local cache folder
if one exists.