smal type in petscsolver

small errors in petscSolver corrected

See merge request !17

PetscOptionsView corrected for petsc 3.7

Another incompatibility wiht petsc 3.7. solved

See merge request !16

petsc 3.7. ABI change in KSPMonitorSet included

The second argument type in KSPMonitorSet was changed in petsc version >= 3.7. This changes is included in AMDiS by providing a macro depending on the petsc version.

See merge request !15

Issue/cmake cleanup

Added some more fixes to old cmake versions

See merge request !14

Issue/cmake cleanup

CMake files for old and new (>=3.2) cmake versions are now synchonized, i.e. do nearly exactly the same, except for the used cmake commands.

The targets are now named according to a configuration, i.e. sequential targets get the suffix `-s` and parallel targets the suffix `-p`. For a debug configuration the suffix `d` is added addeitionally.

This several AMDiS versions can be installed in the same directory.

The `AMDiSConfig.cmake` script provides a component argument, where you can specify which configuration to load:

```cmake
find_package(AMDiS 1.1 REQUIRED [PARALLEL|SEQUENTIAL])
add_executable(yourTarget <yourSources>)
include_directories(${AMDIS_INCLUDE_DIRS})
compile_definitions(${AMDIS_COMPILEFLAGS})
target_link_libraries(yourTarget ${AMDIS_LIBRARIES})
```

Additionally a version argument can be provided, since a `AMDiSConfigVersion.cmake` file is generated.

See merge request !13

Issue/petsc 3 7

Make AMDiS compatibale to PETSc version 3.7 (since there were some interface changes)

See merge request !12

Issue/cmake 2 8 10

Rewritten the cmake configuration for cmake version 2.8.10 in the same style as cmake 3.0 variant

See merge request !11

Issue/tests

Tests are stored in the directory [root]/test and split into several directories.

See merge request !10

cleaned up cmake configuration for cmake 2.8. TODO: adopt configuration for cmake 3. Parallel AMDiS is now provided as package component

Periodic BC implemented by Siqi Ling added to this branch

Rewritten periodic BC, to be compatible in sequential and parallel and to allow mixed finite element spaces.

See merge request !9

Issue/cmake configuration

rewritten several cmake files to be more compatible with several linux distributions

See merge request !8

# Conflicts:
#   AMDiS/cmake3/CMakeLists.txt

changed DEBUG to NOT NDEBUG and removed separate debug target from cmake

replaced all occurences of preprocessor directives `#if DEBUG != 0` or similar lines by `#ifndef NDEBUG`

See merge request !7