* add new endpoints, all of them include a `pagination` field in reply, and accept QueryParams:
* GET /elections
* page
* limit
* status
* organizationId
* electionId
* withResults
* finalResults
* manuallyEnded
* GET /accounts
* page
* limit
* GET /chain/transactions
* page
* limit
* height
* type
* GET /chain/organizations
* page
* limit
* organizationId
* GET /chain/fees
* page
* limit
* reference
* type
* accountId
* GET /votes
* page
* limit
* electionId
* mark all of these endpoints as deprecated on swagger docs:
* GET /accounts/page/{page}
* GET /accounts/{organizationID}/elections/status/{status}/page/{page}
* GET /accounts/{organizationID}/elections/page/{page}
* GET /elections/page/{page}
* POST /elections/filter/page/{page}
* GET /chain/organizations/page/{page}
* POST /chain/organizations/filter/page/{page}
* GET /elections/{electionId}/votes/page/{page}
all of these were anyway refactored in a backwards-compatible manner,
to unify pagination logic (adding `pagination` field)
* api: return ErrPageNotFound on all paginated endpoints, when page is negative or higher than last_page
* api: new param `limit` in all paginated endpoints
(defaults to DefaultItemsPerPage if ommitted, and can't surpass hardcoded MaxItemsPerPage)
* api: all paginated endpoints return an empty list in case of no results (instead of 404)
api internal code refactorings:
* api: unify hardcoded structs into a new types:
* AccountsList
* ElectionsList
* OrganizationsList
* FeesList
* VotesList
* TransactionsList
* CountResult
* api: deduplicate several code snippets, with marshalAndSend and parse* helpers
* api: rename const MaxPageSize -> MaxItemsPerPage
* api: add Param* consts, and fix case of all URLParams 'ID' -> 'Id'
* api: add *Params types (PaginationParams, ElectionParams, etc)
* api: fix strings in errors returned to client, replacing "ID" -> "Id"
* api: fix swagger docs, replace many occurences of "ID" -> "Id"
* api: fix swagger docs, lots of small inaccuracies
* test: add TestAPIAccountsList and TestAPIElectionsList
indexer changes:
* rename GetListAccounts -> AccountList
* rename GetEnvelopes -> VoteList
* replace GetTokenFees* methods with a single TokenFeesList
* methods AccountList, ProcessList, EntityList, VoteList, TokenFeesList now:
* return a TotalCount
* reordered and renamed args (from, max) -> (limit, offset)