configurable write delay and non-blocking cache serialization
fixed non-utf8 encoding of JSP and escaped &deg;
Merge branch 'develop' of https://github.com/52North/SOS into develop

* 'develop' of https://github.com/52North/SOS:
  implemented asynchronous cache serialization on updates
  create a composite exception from all SQL exceptions
  use 'SELECT 1' as test query
  set C3P0 idle test timeout to 30s
  Update to #59 regarding the suggestion by shane-axiom. Now the SOS uses org.n52.sos.ds.Datasource property to load the defined class, e.g. org.n52.sos.ds.datasource.PostgresDatasource, in the Configurator and call the getter for ConnectionProviderIdentificator and DatasourceDaoIdentifier.
Merge pull request #65 from autermann/fix/cache-serialization-performance

Configurable write delay and non-blocking cache serialization