Merge pull request #12 from UECIDE/master

Added build scripts and versioning information for new plugin system
Fixed #13 and also resolves #11

Added #defines to identify Core, Board groups, and features. See the
README for what has been added.
Fixes #14

Allows all ADMUX bits to be used on chips with more than 8 channels.
Updated downloads folder.
Fixed #11

Added OSCCAL default for x313 variants.
Fixed #16 and also #17

This fixes #16. The last commit fixed #17, but I made a typo in the
commit name and put #11 instead of #17.
Updated downloads folder with #16 and #17 patches
Merge pull request #20 from UECIDE/master

Merging UECIDE fork into master branch
Fixes #19

Fixes a mistake in the last commit with incorrect #elif statements
Fixed incorrect pins_arduino.h in UECIDE core

The ATTiny2313 variants for some reason ended up with the ATTiny84
boards.h file. This has been rectified.
Corrected HardwareSerial ISRs

There was yet another glitch in the Hardware Serial library, firstly due
to a misplaced comma in a #define, and also that it would #error that
there is no UART1 even if the device doesn't have one.
Merge pull request #1 from TCWORLD/master

Updates to Tiny Core