Resolve "File headers of writer classes"

Closes #497

See merge request !315

File header to AMR Ippl classes

See merge request !314

Add file header to AMR solver classes

See merge request !313

Resolve "Template directory not found when path contains spaces"

Closes #493

See merge request !310

Resolve "File header for OPAL source proposal"

See merge request !308

Resolve "cleanup: Boost versions checks"

Closes #492

See merge request !306

Resolve "Unused classes in src"

Closes #491

See merge request !307

Resolve "BEAM without particles specified crashes"

Closes #490

See merge request !305

Resolve "Clang compiler warning for IntTSC (-Wsign-compare)"

Closes #487

See merge request !301

Resolve "clang compiler warnings in unit tests"

Closes #489

See merge request !304

Resolve "clang compiler errors for MPI_AllReduce (-Wtype-safety)"

Closes #485

See merge request !303

Merge branch '488-clang-compiler-error-unmatched-template-parameter-const-centeringenum' into 'master'

Resolve "clang compiler error: unmatched template parameter `const CenteringEnum*`"

Closes #488

See merge request !302

Resolve "clang compiler error for VerticalFFAMagnet"

Closes #484

See merge request !299

Resolve "Compiler warnings from boost headers stops compilation"

Closes #483

See merge request !300

Resolve "Broken link in Readme"

See merge request !298

Resolve "What is the status of OPAL Map?"

Closes #464

See merge request !294

Use std::round(x) instead of std::floor(x+0.5)

See merge request !297