smarter / java-debug

add user settings (microsoft#94)
* add user settings

* add debug settings feature

* update java doc for json format of configuration.

* update setting names

* merge log level together with other settings

* add private ctor for DebugSettings to avoid create DebugSettings instance

* using JsonUtil to fill settings.

* merge log level together with other settings

* rollback useless code changes changed by code formater

* rollback useless code changes changed by code formater

fix the inconsistent uri issue for set breakpoint request (microsoft#84)
* fix the inconsistent uri issue for set breakpoint request

Signed-off-by: Jinbo Wang <jinbwan@microsoft.com>

* add vscode bug number

Signed-off-by: Jinbo Wang <jinbwan@microsoft.com>

* fix review comments

Signed-off-by: Jinbo Wang <jinbwan@microsoft.com>

add set log level handler for setting log level from vscode side. (mi…
…crosoft#47)

* add set log level handler for setting log level from vscode side.

* disable jdt log for unmatched level.

* revert local debug changes

* reset log levels for logger handler.