v0.2 release

v0.2 (#6)

#  Fixes

* Add -t and -m arguments at `mbed compile` call

* Missing parentheses fix

* Remove '!' from 'system' calls

* Fix minor syntax typos

# New features - additions

* Implement variable-length argument lists for Mbed[Add|Remove]


* Add `<leader>l` mapping to MbedList()

* Change MbedGetTargetandToolchain() mapping: F11 -> F12

Closes #5 , #7 , #9