It supports H2 database.

When it imported from database, firstly
all columns infomation was read for cache,
i fix it to read per schema. So irrelevant schema will not be read. 

fix the bug when it imported from database, if a relation was selected on diagram, the exception occured.

git-svn-id: http://svn.code.sf.net/p/ermaster/svn@93 262b1df3-3705-4e7d-84bc-ae5d46f3fe09
一部のソースコードの文字コードがSJISであったため、UTF-8に統一