This is not organized as a 'project' - the files here needs to replace
the ones in the main tree. I'll probably import the rest of the core
and make it a standalone replacement, so it's easy to review.

The goals are to:
- make ant more 'embeddable'
- integrate it better in other tools
- support SAX2 and namespaces
- support pluggable behavior for the XML reader
- support pluggable task factories - the factory will have full control
over the class loader
- better support and integration with existing java beans.

All that while maintaining full compatibility with ant1.4 - all
the code here is just an additional set of hooks, with the previous
behavior preserved and remaining as default.

Eventually this can be refactored into a standalone component
that will implement a task engine for ant1.x.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@271572 13f79535-47bb-0310-9956-ffa450edef68

Most of the functionality in Main is moved into AntBean ( all public/protected
methods are now wrappers around AntBean's functionality, for backward compat).

Same in ProjectHelper - again, for backward compat the public/protected functions
are unchanged, old code can still call the old methods and get similar behavior.


In TaskAdapter - few improvements ( still more to go ) to allow a program
to control tasks that are in a child loader. That's extremely important to
get ant embeded and controlled in a programatic way ( Project may create
tasks in a child class loader, so casting will fail - the only way
to use them is by using introspection ). I've also added the ability
to 'adapt' beans that have multiple methods, not only execute()

Please review, try, let me know when I can commit it.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@271514 13f79535-47bb-0310-9956-ffa450edef68