SBT based code generator (#22)

[guersam]

Eventually I managed to compile it!

Changes are as below:

• When you compile using SBT, it automatically generate the source code from templates. If you just want generated sources, scaloid:generate task will do this.
• I wrote event listener extractor based on your implementation. Some listeners are added as a result but they have potential issues mentioned at Possible issue with multiple short listeners #24.
• removed setter helper because it's rarely used and hard to convert to StringTemplate. Maybe we need something more powerful to replace this.
• Included property setters having nameClashed. I'll remove them if it's excluded by intention.
• Some hacks are used for the interoperability between Scala and Java. I tried to keep readability of the source code, but additional discussion or comment might be needed.
• Moved package object file to inside of package directory.

[pocorall]

GREAT! Thank you for this awesome contribution.
I will review the issues following this pull within two or three days.

[guersam]

Happy to be a committer of Scaloid :)
I'll keep #22 open until your review and look for other enhancements.