fix versions with spaces and add warning

Author: jrainville

lib/versions/library_manager.js

@@ -27,6 +27,14 @@ class LibraryManager {
     this.versions['solc'] = solcVersionInConfig;
     this.versions['web3'] = web3VersionInConfig;
     this.versions['ipfs-api'] = ipfsApiVersion;
+
+    Object.keys(this.versions).forEach(versionKey => {
+      const newVersion = this.versions[versionKey].trim();
+      if (newVersion !== this.versions[versionKey]) {
+        this.embark.logger.warn(`There a a space in the version of ${versionKey}. We corrected it for you ("${this.versions[versionKey]}" => "${newVersion}").`);
+        this.versions[versionKey] = newVersion;
+      }
+    });
   }
 
   registerCommands() {