- refactor $LET variable handling for easier addition of new presets and exposing internal values to the currently compiling program
- exposed DEPENDENCY_SOCKETS for conditional compiling of net helper functions in auto-include afterlastline.bm
- added DEBUG_IS_ACTIVE variable indicating program is compiling with $DEBUG features, closes #29

- no longer requires HTTP support to be enabled by $UNSTABLE:HTTP flag, instead libcurl is always pulled together with DEPENDENCY_SOCKETS
- adapted helper function WhatisMyIP$ to use libcurl features which are always available now
- deleted unneeded $UNSTABLE http tests and revoved the flag from the remaining http tests

- removes some unreliable commented code sections (updating)
- guess we won't ever go to reactivate and fix this anyway

- reworked to run through the new auto-include logic, rather than by faking a real $INCLUDE internally
- added error messages in case someone is trying to use both color sets in the same program
- for the rare case someone really needs both, the $COLOR:0 constants are also added to $COLOR:32, but "z" prefixed

- tests to prove the files are auto-included as expected
- testing the exposed $DEBUG state flag
- cleaning the dependency system
- final adjustments

- adapting all source files to use the new constants provided through auto-include beforefirstline.bi
- removed the old constants from global/constants.bi
- some formatting

- updating the bootstrap compiler to work under the new conditions

- this is ridiculous, just because line numbers have changed it fails
- somebody should rethink that test system
- meantime we more fixing the tests, than errors in the source they shall unveil