* refactor-default-abs-sender: move all returns to `try` scope
- it makes clear that return would not happen if some exception has been thrown
* refactor-default-abs-sender: extract `sendHttpPostRequest` method
* refactor-default-abs-sender: inline usage of `sendHttpPostRequest` in most occurrences
* refactor-default-abs-sender: extract creation of `HttpPost` with configuration to method
* refactor-default-abs-sender: rearrange code to ease up refactoring
* refactor-default-abs-sender: extract `sendMethodRequest` method
* refactor-default-abs-sender: move temporary file names to variables
* refactor-default-abs-sender: extract files downloading to separate methods
* refactor-default-abs-sender: extract creation of `Runnable` for async file download to method
* refactor-default-abs-sender: extract `assertParamNotNull` method
* refactor-default-abs-sender: rename `tryToDownloadToTemporaryFile` method
LongPollingBot extinsion performing time-based sends obeying basic Telegram limits (no more 30 messages per second in different chats, no more 1 message per second in any single chat).
* Update HOWTO.md (#155)
- add video edition of this howto, only a draft
- add two FAQ's
* Update license to MIT
* Update HOWTO.md (#155)
- add video edition of this howto, only a draft
- add two FAQ's
* Update license to MIT
* Migrate to separate modules
* Move to separate modules
* Move to separate modules
* Move to separate modules