Goto this link http://msdn.microsoft.com/en-us/jj650014 and install the SQL Server Data Tools for Visual Studio 2010
This will install on your local drive. In my case here is where it put it: C:\Program Files (x86)\Microsoft SQL Server\110\DAC\bin
Browse to this via the command line or powershell
You are going to want to execute the SqlPackage.exe
Open up this link to see a list of all the parameter options for SqlPackage.exe (http://msdn.microsoft.com/en-us/library/hh550080(v=vs.103).aspx)
Here is my command line that I needed to execute to import a .bacpac file into my local SQL 2008 R2 server:
.\SqlPackage.exe /a:Import /sf:C:\mydatabasefile.bacpac /tdn:NorthWind /tsn:BINGBONG
/tdn is the name of the database you want your bacpac file to restore to. /tsn is the name of your SQL server.
You can see all these parameter descriptions on the link from #5.