API:
Added sample AT-emitted transaction types (payment/message).
Maximum number of steps per execution round no longer hard-coded.
API.putTransactionAfterTimestampInA() sets A to zero if no more transactions.
API.putMessageFromTransactionInAIntoB sets B to zero if not a message transaction.
Added some convenience methods.
MachineState:
Added support for minimum activation amount.
Added static method for packing AT into "creation bytes".
No need to store unchanging code in per-height AT state data.
Added support for multiple blockchains to "Timestamp".
General improvements based on Sonarlint suggestions.
General improvements to comments.
Replaced deprecated Byte/Short/Integer/Long constructor call with corresponding .valueOf() call.
Replaced some string concatenations with StringBuilder.
Moved Java-related .gitignore from root to /Java/
Removed .classpath and .project, and added same to .gitignore
Added info on how to add CIYAM AT JAR to other projects.
Updated pom.xml:
Bumped version to 1.2
Bumped Java version from 1.8 to 11
Bumped BouncyCastle from 1.60 to 1.64
Added more tests.