Fixing SPM errors introduced during refactor

src/spm/spm.lua

@@ -126,7 +126,7 @@ local function readFromFile(path)
 end
 
 local function readFromLocalInstallFile()
-    readFromFile(localInstalledPackagesFile)
+    return readFromFile(localInstalledPackagesFile)
 end
 
 local function readLocalConfigFile()
@@ -431,7 +431,7 @@ local function installPackage(requestedPackage, installPath, doUpdate)
         end
 
         if packageInfo.minified or options.m then
-            filePath = string.gsub(filePath, "(.+)\.(.+)$", "%1\.min\.%2")
+            filePath = string.gsub(filePath, "(.+)\\.(.+)$", "%1\\.min\\.%2")
         end
 
         local success = pcall(downloadFile, repositoryPath .. "/" .. filePath, installedPath)