Fix HTTP request corruption by the user agent (GH-32)

The file `VERSION` used to send the version contains a new line.

When it's used to generate the UserAgent for curl, the new line char
stops the headers sent for the request. All other headers sent after the
user agent are ignored and used like the body requests.

To solve this issue, clean up the `VERSION` file content on load.

lib/php/libsdk/SDK/Config.php

@@ -218,7 +218,7 @@ class Config
 		}
 
 		/* Try to figure out the branch. The worky scenarios are
-			- CWD is in php-src 
+			- CWD is in php-src
 			- phpize is on the path
 			FIXME for the dev package, there should be a php-config utility
 		 */
@@ -256,7 +256,7 @@ class Config
 				$cmd = "\"$git\" branch";
 
 				$ret = trim(shell_exec($cmd));
-				if (preg_match_all(",\*\s+master,", $ret) > 0) {	
+				if (preg_match_all(",\*\s+master,", $ret) > 0) {
 					$branch = "master";
 				}
 			}
@@ -271,7 +271,7 @@ class Config
 			$branch = self::guessCurrentBranchName();
 			self::setCurrentBranchName($branch);
 		}
-	
+
 		return self::$currentBranchName;
 	}/*}}}*/
 
@@ -336,7 +336,7 @@ class Config
 			throw new Exception("Failed to find config with arch '" . self::getCurrentArchName() . "'");
 		}
 
-		return $ret; 
+		return $ret;
 	}/*}}}*/
 
 	public static function getSdkNugetFeedUrl() : string
@@ -368,7 +368,7 @@ class Config
 			throw new Exception("Couldn't find the SDK version file.");
 		}
 
-		return file_get_contents($path);
+		return trim(file_get_contents($path));
 	}/*}}}*/
 
 	public static function getDepsLocalPath() : ?string
@@ -391,7 +391,7 @@ class Config
 				self::setDepsLocalPath($tmp);
 			}
 		}
-		
+
 		if (NULL == self::$depsLocalPath) {
 			$tmp = realpath("../deps");
 			if (is_dir($tmp)) {