Added fortran interface for PetscLineSearch object and methodsHg-commit: 89ce48c1cee49e5b743eebca90ede614ac665b8c
Added new line searches to the VI solversHg-commit: 6a44ff936e5a659c9d2954305f893c0a5c57878f
Close memory leak in line searchHg-commit: 2e37985ae49d26f8489f8bd97d197f3b7bd0beb4
Namespaced the LineSearch into PetscLineSearchHg-commit: 26f9518a3e47a8fbf342a60b124de65d104c86c8
Small fixes to the BT linesearchHg-commit: 451bbbd291c2f3626796d9234ef1ecd12f1500f4
Added backtracking linesearch (BT) equivalent to the cubic and quadratic searches in SNESLSHg-commit: 03f937746d19830becf65d5fd007d3abf951ac32
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