Added history summary load test
Completed history testing
Added new function ecl_sum_tstep_equal() to check that the TSTEP -> sim_time mapping is identical for two summary cases
Started work on using new-style Signal-connect
Changed to New-style Signal and slot for connections using python objects
Changed two properties too methods
Merge pull request #124 from joakim-hove/gui-python2.6

Gui python2.6