Changed play-scala-intro Scala version to 2.10.4

The DB framework sorm is only working with Scala 2.10.4. Therefor the Scala version in the build.sbt is explicitly set to 2.10.4.

Signed-off-by: Markus Jura <markus.jura@gmail.com>
Default message for error.date message key missing
small typo and readability improvement

Integer Literals
... It is recommended that you use the upper case letter L because the lower case letter l is hard to distinguish from the digit 1.
http://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
Merge pull request #3219 from 0x54696D/patch-1

small typo and readability improvement
Merge pull request #3216 from GitsMcGee/master

Default message for error.date message key missing
Merge pull request #3211 from markusjura/master

Changed play-scala-intro Scala version to 2.10.4