nose and coverage support added
default charet added for collections based in mysql
use nose and coverage in tests
added article about testing
added .kvlite files to ignore
fix issue with self.URI error
remove tmporary files before tests
change version to v0.5.1
remove hard references in messages
add dummy files .kvlite and .sqlite
added instructions for mysql env
common comments format
fix typo
add exception's handler for Collection.close()
simplify access to all collection's items
added link to migration data page
added migration data page
copy data between databases
simlify copy() form
new version v0.3.1