Support byte[] in getObject

Add guards to JDBC debug code

The current implementation of getObject does not support byte[]. This
is an issue for some people [1].

 [1] https://groups.google.com/forum/#!topic/h2-database/InWprFw2B0o

Some of the existing JDBC code is missing guards around debug
statements that allocate strings.

Also build Java 8

To verify compatibility and for potential JSR-310 support
it would be good if we test against Java 8 as well.

fix compare TIMESTAMP WITH TIMEZONE

Added support to define last IDENTIFIER on a Trigger.

Tests for timestamps

since we no longer support jdk6

Implemented unit test.

Improve TimestampWithTimeZone javadoc

I found the comments in TimestampWithTimeZone not helpful in
understanding the semantics of the public methods.

This commit includes the following changes

 - add comments to previously not commented public methods in
   TimestampWithTimeZone that describe the semantics
 - add more verifications to TestTimeStampWithTimeZone to make sure the
   actual behavior matches the documented behavior

Change getters in TimestampWithTimeZone to int

The convenience accessors getYear getMonth and getDay in
TimestampWithTimeZone return long even though their values fall within
the range of int. This makes them a bit inconvenient to work with as
most APIs (Calendar, LocalDateTime) take int for such values.

This commit contains the following changes

 - change TimestampWithTimeZone#getYear() to return an int instead of
   a long
 - change TimestampWithTimeZone#getMonth() to return an int instead of
   a long
 - change TimestampWithTimeZone#getDay() to return an int instead of
   a long

Added missing source encoding. Assuming UTF-8.

Add support for converting JAVA_OBJECT to UUID

Add support for getObject(int|String, Class)

Both JdbcResultSet and JdbcCallableStatement currently do not support
getObject(int, Class) and getObject(String, Class) but support is easy
to add.

This commits contains the following changes:

 - add support for getObject(int, Class) and getObject(String, Class)
    with the following types: BigDecimal, String, Boolean, Byte, Short,
   Integer, Long, Float, Double, Date, Time, Timestamp, UUID,
   TimestampWithTimeZone and Geometry subclasses
 - extend the existing getObject tests to cover these new methods

Most notably missing is support for LOBs and arrays including primitive
arrays but this can always be added later.

Server: use xdg-open to open the WebConsole in the user's preferred browser on Linux

Support for BEFORE and AFTER clauses when using multiple columns in A…

Synchronized on database when unlock tables

Respect format codes from Bind message when sending results

From https://www.postgresql.org/docs/9.1/static/protocol-message-formats.html:

  Bind (F)

  ...

  After the last parameter, the following fields appear:

  Int16

    The number of result-column format codes that follow (denoted R
    below). This can be zero to indicate that there are no result
    columns or that the result columns should all use the default
    format (text); or one, in which case the specified format code is
    applied to all result columns (if any); or it can equal the actual
    number of result columns of the query.

  Int16[R]

    The result-column format codes. Each must presently be zero (text)
    or one (binary).

Also fix testBinaryTypes test:

- force binary by setting prepareThreshold to -1
- handle REAL type as float

Without the fix the corrected test testBinaryTypes fails:

  05:25:02 21:55:02.666 org.h2.test.unit.TestPgServer Expected: 12345678 actual: 825373492
  Exception in thread "main" java.lang.AssertionError: Expected: 12345678 actual: 825373492
      at org.h2.test.TestBase.fail(TestBase.java:464)
      at org.h2.test.TestBase.assertEquals(TestBase.java:617)
      at org.h2.test.unit.TestPgServer.testBinaryTypes(TestPgServer.java:404)
      at org.h2.test.unit.TestPgServer.test(TestPgServer.java:51)
      at org.h2.test.unit.TestPgServer.main(TestPgServer.java:41)