Rearrange handbook files and merge developer handbook and user manual

build.gradle

config.yaml

.../chapter/user/01_The_ProB_Animator_and_Model_Checker.adoc

src/docs/chapter/user/10_General/00_section_header.adoc

src/docs/chapter/user/10_General/01_Installation.adoc

...user/10_General/02_Windows_Installation_Instructions.adoc

src/docs/chapter/user/10_General/10_Animation.adoc

...ocs/chapter/user/10_General/Building_ProB_on_Windows.adoc

...hapter/user/10_General/Colours_of_enabled_operations.adoc

...chapter/user/10_General/Controlling_ProB_Preferences.adoc

src/docs/chapter/user/10_General/Current_Limitations.adoc

src/docs/chapter/user/10_General/Deferred_Sets.adoc

src/docs/chapter/user/10_General/Editors_for_ProB.adoc

src/docs/chapter/user/10_General/GeneralPresentation.adoc

src/docs/chapter/user/10_General/Getting_Involved.adoc

...cs/chapter/user/10_General/ProB_Logic_Calculator_old.adoc

src/docs/chapter/user/10_General/ZZ_section_footer.adoc

src/docs/chapter/user/11_BLanguage/00_section_header.adoc

...ocs/chapter/user/11_BLanguage/01_Summary_of_B_Syntax.adoc

src/docs/chapter/user/11_BLanguage/02_Types.adoc