revamp loop feature

now CBT and builds pass their file names to the current build
via the context. The build then simply blocks until any file changes.
Then it returns with a special exit code, which the bash script picks
up and restarts CBT. Thats works well for looping over project files.
It works less well for looping over builds and CBT itself. For this
a build has to success once, so that the .cbt-loop.tmp file exists.
Then looping works for cbt and builds, but the file list is not
updated in case of compile errors, etc.

Fixes
- https://github.com/cvogt/cbt/issues/406
- https://github.com/cvogt/cbt/issues/405
- https://github.com/cvogt/cbt/issues/202
- https://github.com/cvogt/cbt/issues/50
- https://github.com/cvogt/cbt/issues/22

We should improve for 1.0 in https://github.com/cvogt/cbt/issues/419
to handle looping over build files and cbt itself smarter.

1 files changed, 8 insertions, 0 deletions

diff --git a/doc/docs.md b/doc/docs.md
new file mode 100644
index 0000000..5a34e5b
--- /dev/null
+++ b/doc/docs.md
@@ -0,0 +1,8 @@
+
+### Clearing the screen during task looking
+```
+override def loop{
+  lib.clearScreen
+  super.compile
+}
+```