altoslib: Create data file open helper in AltosLib
authorKeith Packard <keithp@keithp.com>
Sun, 28 May 2017 21:00:15 +0000 (14:00 -0700)
committerKeith Packard <keithp@keithp.com>
Sun, 28 May 2017 21:04:21 +0000 (14:04 -0700)
Use InputStream everywhere, instead of Reader.
Create private string input stream as java one is deprecated.

Signed-off-by: Keith Packard <keithp@keithp.com>

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