Global offset parameter in `occ()`

[sckott]

See if possible

[sckott]

paging parameters by data provider:

• gbif - start, starts at: 0
• ecoengine - page, starts at: 1 (results per page depends on limit param)
• antweb - offset, starts at: 0
• bison - regular rest API start, solr API start, starts at: 0
• inat - page, starts at: 1
• ebird - none
• vertnet - none, also: users cursor for paging - paging is done automatically
• idigbio - offset, starts at: 0

The global offset param could be: start

With non-page type APIs, use as normal, easy.

With page type APIs, potentially round up or down to the nearest 10

E.g. 1

• gbif: limit = 10, offset = 10 - pass as is, works fine
• ecoengine: limit = 10, offset = 10 - pass limit as is, offset => page = 2

E.g. 2

• gbif: limit = 10, offset = 10 - pass as is, works fine
• ecoengine: limit = 100, offset = 50 - pass limit as is, offset => page = 2

meh, can't do this I don't think, as offset for paging type APIs has to be same size as the per_page param

Instead, two parameters for start, one for each type: start, page