Added functions util_strstr_int_format() and util_int_format_count() to scan and check strings with embedded %d.
Cleaned up the work area
Added cmake.sh to .gitignore
Updated ert_util_latex_test to use test_work_area; keeps source area clean.
Merge remote-tracking branch 'upstream/master' into seismic-only-bug
Added support for enkf/StateMap
Updated GEN_DATA initialisation to hard require that result file format contains %d
Removed debug message from gen_data load
Pure white-space change
Changed loading of results from forward model:

 - Created new function enkf_state_internalize_GEN_DATA() which loads
   GEN_DATA instances, irrespective of whether the variable type is
   DYNAMIC_STATE or DYNAMIC_RESULT.

 - The state_load function will only load FIELD instances from the
   ECLIPSE restart file.

 - The result_load function will only load eclipse SUMMARY variables.

 - It is a hard assumption that the summary nodes use vector storage
Some code cleanup.
ERT-403 - Partial multiple case plot widget implemented.
By setting the environment variable ERT_SHOW_BACKTRACE you will get the backtrace on stderr instead of a file.
Function enkf_state_load_ecl_sum() will check ecl_config_active() before loading.
If we ask for the last restart and do not have any history object - return 0 (with a warning on stderr).
Added readonly property to state_map
Added functions in enkf_main and enkf_fs to create readonly state_map - without the full filesystem mount.
Merge remote-tracking branch 'joaho/state-map-readonly' into multiple_plot_case
Added function state_map_is_readonly() to query readonly status.
Merge remote-tracking branch 'joaho/state-map-readonly' into multiple_plot_case