Release 1.1.0

• Adds support for empty symbols (#108, #109)
• Adds support for local symbol append
• Adds support for SID0 (#120)
• Adds support for NOP padding (#107)
• Removes over-reading of data in UnifiedInputStreamX
• Avoids writing fractional second for timestamps when possible
• Throws an exception if the era flips during a Timestamp.add operation (#131)
• Improves error handling for annotations (#113) and symbol/import lists (#118, #119)
• Fixes IonReader.isInStruct/getFieldName/getFieldNameSymbol behavior for DOM-backed readers (#134)