refactoring: now load data from livestatus host per host
Merge pull request #32 from rchakode/github-workstation

refactoring: now load data from livestatus host per host
renamed variables
refactoring on data retrieving
 * drop support for QTcpSocket: replace by native tcp socket
 * update interface of load check methods
refining code and error handling
change the signature of RawSocket class constructor
refactoring: braces, spaces...
added menus for importing data from livestatus within the editor
now make host optional when importing data from livestatus
updated changelog preparing version 3.0.3
fixed compilation on Linux
now disable ok button on importation  when no source is configured
updated README
fixed data importation for Nagios and Livestatus
trimmed settings before saving
Fixed ticket  #35: part 1.

When using livestatus: the related to the displaying of date is now fixed
now display bad message received from livestatus
Fixed ticket #35: related to update timer

Now the operation console refreshes automatically according to setting time interval
update base datastructure preparing for new severity aggregation algorithm
updated data structures and algorithms to compute severity. Fixed ticket #36