Rename plugin from 'Charts' to 'Sockets'

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rename : src/chartsplugin.h => src/socketsplugin.h
Added .hgignore to ignore generated Makefile and object files
Add enabled and port properties

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extra : amend_source : 11e2447f46de4405bf2f940db91bfcafe252adbd
Added sublime text droppings to hgignore
Add Rakefile to make building quick
Add error and log signals to Socket

--HG--
extra : amend_source : e9d12751b88ec5a47133428a45a2560b373c64b1
Stub out basic socket facilities to QML