Fix capitalization of output path.

To "Build" folder with capital B.

Author: angularsen

Src/UnitsNet/UnitsNet.net35.csproj

@@ -12,7 +12,7 @@
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile>Client</TargetFrameworkProfile>
-    <OutputPath>..\..\build\bin\$(Platform)_$(Configuration)\</OutputPath>
+    <OutputPath>..\..\Build\bin\$(Platform)_$(Configuration)\</OutputPath>
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
   </PropertyGroup>

Src/UnitsNet/UnitsNet.netcore45.csproj

@@ -14,7 +14,7 @@
     <DefaultLanguage>en-US</DefaultLanguage>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{BC8A1FFA-BEE3-4634-8014-F334798102B3};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
-    <OutputPath>..\..\build\bin\$(Platform)_$(Configuration)\</OutputPath>
+    <OutputPath>..\..\Build\bin\$(Platform)_$(Configuration)\</OutputPath>
     <TargetPlatformVersion>8.1</TargetPlatformVersion>
     <MinimumVisualStudioVersion>12</MinimumVisualStudioVersion>
     <TargetFrameworkVersion />

Src/UnitsNet/UnitsNet.pcl.csproj

@@ -14,7 +14,7 @@
     <TargetFrameworkProfile>Profile136</TargetFrameworkProfile>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
-    <OutputPath>..\..\build\bin\$(Platform)_$(Configuration)\</OutputPath>
+    <OutputPath>..\..\Build\bin\$(Platform)_$(Configuration)\</OutputPath>
     <FileUpgradeFlags>
     </FileUpgradeFlags>
     <UpgradeBackupLocation>

Src/UnitsNet/UnitsNet.sl4.csproj

@@ -17,7 +17,7 @@
     <SilverlightApplication>false</SilverlightApplication>
     <ValidateXaml>true</ValidateXaml>
     <ThrowErrorsInValidation>true</ThrowErrorsInValidation>
-    <OutputPath>..\..\build\bin\$(Platform)_$(Configuration)\</OutputPath>
+    <OutputPath>..\..\Build\bin\$(Platform)_$(Configuration)\</OutputPath>
     <FileUpgradeFlags>
     </FileUpgradeFlags>
     <UpgradeBackupLocation>