FEATURE: Use of multi-character delimiters

[chb0github]

Discussed in #88

Currently the --@delimiter flag only accept a single character. Considering most programming languages are capable of using every character on the keyboard, frequently a multi-character delimiter is used.

[harawata]

Fixed in the core via mybatis/mybatis-3@082bb34
That version of the core will be included in the next release (3.3.2).

It is also possible to verify the fix with the following steps.

• Replace older mybatis-VERSION.jar in $MIGRATIONS_HOME/lib` with the latest mybatis-3.4.6-SNAPSHOT.jar obtained from the snapshot repo.
• Edit the hardcoded JAR file name in the startup scripts in $MIGRATIONS_HOME/bin/.

Thank you!