release-1.5: Read Access

Features added:

• #21: Conceive file mapping schema
• #22 #23: Directory Listing
• #26: Mount Notification
• #44: Unmounting logic
• #48: File Reading
• #49: MIME detection

Bugs fixed:

• #24: USB Drive would not show up in SAF
• #38: All zero return value
• #47: Date was falsely shown as 1st Jan 1970
• #61: Crash when browsing Sub-Dir