Version 0.9.0 Release - 2019-09-21

This is a major overhaul with many fixes and changes!
Note: The automatic micro-locking is (intentionally) overdoing right now, but this will be fixed for the next release.

Changes and additions

• The API has been completely overhauled and should now have reached its final form. From here on the API may be extended, but changes shall be rare and removals non-existent.
• The stupid pwx_ prefixes for header names are gone. Instead, generalized <PFoo> headers have been added, inspired by the <QFoo> headers of Qt. (some minor headers still have a pwx_ prefix to not clash with other headers, like <basic/pwx_debug.h> for example.)
• Thread safety has been greatly improved, and gcc-9.2.0 ThreadSanitizer does not find anything any more in test_lib.
• The API documentation, although not fully complete, yet, has been overhauled and fixed.
• The library now has a Travis account and a .travis.yml file for automatic building on push.
• test_lib now also tests the automatic growing of TOpenHash.
• TOpenHash and TChainHash are now properly described.
• Removed the artificial limit for insertions of 1000000 elements from VTHashBase.
• Most tool macros now support, some even enforce, to be ended with a semicolon.
• Container and element destructors now wait until no other thread is waiting for a lock, before finalizing the dtor.
• The hash table in VTHashBase is now private and the accessors take care that nobody wreaks havoc.

Fixes

• Fixed a possible access error in THashElement.
• Fixed several possible access errors in VTHashBase.
• Found and fixed a memory leak due to a typo in VTHashBase->clear().
• The trace information eventually works correct.
• Fixed an error in CThreadElementStore where an atomic store used loading memory order.