2.0.0

Based on #2:

• Refactor the code structure to validate properties more clear
• Ensure compatibility with Titanium SDK 5.5.1+
• Add new properties attachments and subject
• Deprecate isSupported and introduce canSendText, canSendSubject and canSendAttachments
• Updated the example

v1.0

[MOD-1798] Split SMS into seperate repository