Add new elements

diode/bas70-04.yaml

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+name: BAS70-04
+description: Small Signal Schottky Diodes, Dual
+keywords: Diode, Schottky
+
+pinout:
+  A: 1
+  CA: 3
+  C: 2
+
+schematic:
+  symbol: twin-diode
+  options: schottky
+
+housing:
+  outline: JEDEC TO-236 AB

diode/bas70-05.yaml

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+name: BAS70-05
+description: Small Signal Schottky Diodes, Dual
+keywords: Diode, Schottky
+
+pinout:
+  A1: 1
+  C: 3
+  A2: 2
+
+schematic:
+  symbol: twin-diode
+  options: schottky
+
+housing:
+  outline: JEDEC TO-236 AB

diode/bas70-06.yaml

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+name: BAS70-06
+description: Small Signal Schottky Diodes, Dual
+keywords: Diode, Schottky
+
+pinout:
+  C1: 1
+  A: 3
+  C2: 2
+
+schematic:
+  symbol: twin-diode
+  options: schottky
+
+housing:
+  outline: JEDEC TO-236 AB

nxp/74hc4050.yaml

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+name: 74HC4050
+description: Hex High-to-Low Level Shifter
+datasheet: http://www.nxp.com/documents/data_sheet/74HC4050_CNV.pdf
+keywords: IC, Digital, Buffer, Shifter
+
+pinout:
+  IN:
+    1A: 3
+    2A: 5
+    3A: 7
+    4A: 9
+    5A: 11
+    6A: 14
+  OUT:
+    1Y: 2
+    2Y: 4
+    3Y: 6
+    4Y: 10
+    5Y: 12
+    6Y: 15
+  VCC: 1
+  GND: 8
+  NC: 13, 16
+
+properties:
+  in: 1A, 2A, 3A, 4A, 5A, 6A
+  out: 1Y, 2Y, 3Y, 4Y, 5Y, 6Y
+  power: VCC
+  ground: GND
+  nc: NC
+
+schematic:
+  symbol: IC
+  left: IN, NC
+  right: OUT, NC
+  top: VCC
+  bottom: GND
+
+housing:
+  suffix: D
+  outline: JEDEC MS-012 AC