Add Serial.buffer() and Serial.bufferUntil() functions. [imported]

[cmaglie]

This is Issue 535 moved from a Google Code project.
Added by 2011-05-07T17:10:42.000Z by dmel...@gmail.com.
Please review that bug for more context and additional comments, but update this bug.

Original labels: Type-Enhancement, Priority-Medium, Component-Core

Original description

These should be along the lines of the Processing equivalents, triggering the corresponding serialEvent() functions when the particular character or number of characters is read.