Update README.md

Change the import module name and .psd1 file to ScriptAnalyzer to match the VS solution name. That way we can solve the confusion of binplace and import-module.

Author: yutingc

README.md

@@ -27,7 +27,7 @@ Installation
 
 2. In PowerShell Console:
 ```powershell
-Import-Module PSScriptAnalyzer
+Import-Module ScriptAnalyzer
 ```
 If you have previous version of PSScriptAnalyzer installed on your machine, you may need to override old binaries by copying content of [``~/ProjectRoot/ScriptAnalyzer``] to PSModulePath.