Use is like:
```
(declare-native
:name "my-nuermical-library"
:source @["numerical_lib.c"]
:native-deps ["tarray"])
```
Where `tarray` is a native generated by o ne of the project
dependencies. This will lets us move more C functionality out of the
core of Janet while still allowing it's use from natives.
This means a binscript needs to indicate that it is a Janet script, and
then the user who is installing the script can choose whether or not to
do the magic shebang replacement.
This fixes a regression from changes to janet_try. In some cases, we
would not update the status of a fiber when signaling, which left the
fiber's status as whatever it had previously. This could lead to strange
control flow issues.
Add --no-core option to quickbin, as well as :no-core option
to declare executable. This doesn't use the autodetection when
making binaries, instead opting for manual intervention.
This means we no longer need to guess paths after install.
Custom directory layouts can now be better supported at install
time without need for environment variables.
This should allow work arounds for some windows installs.
Also, be clever about finding the location of te current git
executable on windows to avoid some path issues that seem to
occur on some windows installations.
Introduce linker flags vs. library flags in jpm
in a backwards compatible way - most usage of lflags was for library
flags, so we will preserve that behavior.
Make install and uninstall commands variadic.
Add :libs option to many decalre commands. This behaves much like
lflags, but will be places after all linker flags are given.
Dedent has been moved to spork as misc function.
There are two many different, incompatible ways to 'dedent'
as string, and it seems rather specific to add to the core like it is.
