Add some missing TAR WG I entries

[durack1]

Missing:

• Full Report; Houghton et al.
• Summary for Policymakers; Houghton et al.
• Technical Summary; Allbritton and Meira Filho et al.
• Ch1 The Climate System: an Overview; Baede et al.
• Ch2 Observed Climate Variability and Change; Folland and Karl et al.
• Ch12 Detection of Climate Change and Attribution of Causes; Mitchell and Karoly et al.
• Ch13 Climate Scenario Development; Mearns and Hulme et al.
• Ch14 Advancing Our Understanding; Moore III et al.