Added LM2674 switching regulator.

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>
Started an MSP430 symbol library.

First symbol: MSP430G2x53 20-pin variants (TSSOP and PDIP).

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>
Added MSP430G2x13-20 alias.

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>
Added 28-pin variants of MSP430G2x13 and MSP430G2x53.

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>
Started a library of switches.

Starting out with 7- and 10- DIP switch arrays.

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>
Fixed DIPSW_7 pin numbers.

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>
Added NX3L2467 dual DPDT analog switch.

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>
Added LM2576 buck regulator.

Signed-off-by: Joe Baker <jbaker@alum.wpi.edu>