Moved ExpToCasExe and its DLL to new module - DETools
Created new module - DETools to keep tools to DE
Changed definition of main of ExpToCasExe to not const parameter
FlexLexer.h moved to general location into TKernel
Script now defines a minimal Android API version when %anNdkApiLevel% is set to empty value
as 16 for 32-bit targets and 21 for 64-bit targets.
Added clearing of destination folders.
Added better handling of errors.
Added script adm/scripts/android_build.bat and template android_custom.bat.template
intended for automating building routines targeting Android platform.
OpenCASCADEConfig.cmake has been extended to detect "$INSTALL_DIR/libs/$CMAKE_ANDROID_ARCH_ABI/cmake/opencascade" location.