FLEX-34785 Minor improvements to the README file.
FLEX-34785 Minor improvements to the README file.

SlavaRa/flex-sdk,adufilie/flex-sdk,adufilie/flex-sdk,danteinforno/flex-sdk,apache/flex-sdk,SlavaRa/flex-sdk,apache/flex-sdk,apache/flex-sdk,danteinforno/flex-sdk,danteinforno/flex-sdk,adufilie/flex-sdk,SlavaRa/flex-sdk,adufilie/flex-sdk,SlavaRa/flex-sdk,adufilie/flex-sdk,SlavaRa/flex-sdk,SlavaRa/flex-sdk,apache/flex-sdk,adufilie/flex-sdk,danteinforno/flex-sdk,apache/flex-sdk,danteinforno/flex-sdk,danteinforno/flex-sdk,apache/flex-sdk