Add Ads method

[SevereCloud]

https://vk.com/dev/ads

• [x] ads.addOfficeUsers Adds managers and/or supervisors to advertising account.
• [x] ads.checkLink Allows to check the ad link.
• [x] ads.createAds Creates ads.
• [x] ads.createCampaigns Creates advertising campaigns.
• [x] ads.createClients Creates clients of an advertising agency.
• [x] ads.createLookalikeRequest
• [x] ads.createTargetGroup Creates a group to re-target ads for users who visited advertiser's site (viewed information about the product, registered, etc.).
• [x] ads.createTargetPixel Creates retargeting pixel.
• [x] ads.deleteAds Archives ads.
• [x] ads.deleteCampaigns Archives advertising campaigns.
• [x] ads.deleteClients Archives clients of an advertising agency.
• [x] ads.deleteTargetGroup Deletes a retarget group.
• [x] ads.deleteTargetPixel Deletes target pixel.
• [x] ads.getAccounts Returns a list of advertising accounts.
• [x] ads.getAds Returns number of ads.
• [x] ads.getAdsLayout Returns descriptions of ad layouts.
• [ ] ads.getAdsTargeting Returns ad targeting parameters.
• [ ] ads.getBudget Returns current budget of the advertising account.
• [ ] ads.getCampaigns Returns a list of campaigns in an advertising account.
• [ ] ads.getCategories Returns a list of possible ad categories.
• [ ] ads.getClients Returns a list of advertising agency's clients.
• [ ] ads.getDemographics Returns demographics for ads or campaigns.
• [ ] ads.getFloodStats Returns information about current state of a counter — number of remaining runs of methods and time to the next counter nulling in seconds.
• [ ] ads.getLookalikeRequests
• [ ] ads.getOfficeUsers Returns a list of managers and supervisors of advertising account.
• [ ] ads.getPostsReach
• [ ] ads.getRejectionReason Returns a reason of ad rejection for pre-moderation.
• [ ] ads.getStatistics Returns statistics of performance indicators for ads, campaigns, clients or the whole account.
• [ ] ads.getSuggestions Returns a set of auto-suggestions for various targeting parameters.
• [ ] ads.getTargetGroups Returns a list of target groups.
• [ ] ads.getTargetPixels
• [ ] ads.getTargetingStats Returns the size of targeting audience, and also recommended values for CPC and CPM.
• [ ] ads.getUploadURL Returns URL to upload an ad photo to.
• [ ] ads.getVideoUploadURL Returns URL to upload an ad video to.
• [ ] ads.importTargetContacts Imports a list of advertiser's contacts to count VK registered users against the target group.
• [ ] ads.removeOfficeUsers Removes managers and/or supervisors from advertising account.
• [ ] ads.removeTargetContacts
• [ ] ads.saveLookalikeRequestResult
• [ ] ads.shareTargetGroup
• [ ] ads.updateAds Edits ads.
• [ ] ads.updateCampaigns Edits advertising campaigns.
• [ ] ads.updateClients Edits clients of an advertising agency.
• [x] ads.updateTargetGroup Edits a retarget group.
• [x] ads.updateTargetPixel