chore, build libmutti with range support
minor, provide bitte API for bitemporal access
minor, provide simplistic test case in mutti tool
minor, provide bitte_get() and echs_bitmp_t objects
chore, operate on oids (== uintptr_t) to allow for efficient x32 handling
minor, provide a simple timeline index and implement bitte API therewith
minor, define empty_range to be [ECHS_FOREVER,ECHS_FOREVER)
Merge branch 'core/bitte'

* core/bitte:
  chore, operate on oids (== uintptr_t) to allow for efficient x32 handling
  minor, provide bitte_get() and echs_bitmp_t objects
  minor, provide simplistic test case in mutti tool
  minor, provide bitte API for bitemporal access
  chore, build libmutti with range support
Merge branch 'core/timeline'

* core/timeline:
  minor, define empty_range to be [ECHS_FOREVER,ECHS_FOREVER)
  minor, provide a simple timeline index and implement bitte API therewith