[PATCH] Increment OCCT version up to 7.5.0

Original commit url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=commit;h=628c0211d53c7fe1036a85e7a7b2b067c9c50f7a

[PATCH] Increment OCCT version up to 7.5.0beta

Original commit url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=commit;h=278da162dc52c26c8cfe9d002a6f07db12405194

[PATCH] 0031462: Modeling Algorithms - BOP result depends on the argu…

…ments order

Eliminate numerical instability by ensuring that the tolerance of intersection entities is slightly grater than the actual distance to the shapes creating the entity.

Original commit url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=commit;h=3f7e5e99d565e35f600da5f089b0fc7a3851fbde

Initial import. Increment OCCT version up to 7.4.0

Original commit: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=commit;h=fd47711d682be943f0e0a13d1fb54911b0499c31

Official occt packages

Merge pull request #690 from tpaviot/review/appveyor-fix-mingw

Review/appveyor fix mingw

Merge pull request #672 from tpaviot/review/prepare-0.18.2

Set version number to 0.18.2, updated NEWS and README

Merge pull request #666 from tpaviot/review/prepare-0.18.1

prepare release 0.18.1

Updated NEWS and appveyor files

Merge pull request #650 from tpaviot/review/prepare-0.18

Review/prepare 0.18