CHG: the composer.json has been enhanced to support zip-files and GitHub

git-svn-id: https://php-sql-parser.googlecode.com/svn/trunk@1360 44dcfd11-89b7-3d55-2063-5c365055f77f
CHG: the source part of the package repository type has been removed. It seems to be obsolete.

git-svn-id: https://php-sql-parser.googlecode.com/svn/trunk@1361 44dcfd11-89b7-3d55-2063-5c365055f77f
ADD: a new test case for issue 137

git-svn-id: https://php-sql-parser.googlecode.com/svn/trunk@1362 44dcfd11-89b7-3d55-2063-5c365055f77f
CHG: the calculator allows now letters behind a closing backtick
FIX: issue 137

git-svn-id: https://php-sql-parser.googlecode.com/svn/trunk@1363 44dcfd11-89b7-3d55-2063-5c365055f77f
Merge branch 'svnsync'

CHG: composer.json to handle packages
FIX: issue 137