[CRA-283]
Reading input gravity files. Only one input file with all data (5 columns), removed input of location coordinates.

Added ModelGravityStatic and ModelGravityDynamic.
[CRA-283],[CRA-285]
Initial implementation of gravimetric inversion. Not finished, not completely tested.
Fixed conflicts after merge.
Merge branch 'Fix_conflicts' into CRA-283+285

Conflicts:
	crava.vcxproj.filters
Merge branch 'master' into CRA-283+285
Merge branch 'master' into CRA-283+285
[CRA-283],[CRA-285] Fix unintended changes.
[CRA-283],[CRA-285] Fixing VS project files.