LZMA preliminary work and fix (joernhees#7) (#1)

* LZMA test

- use of backports.lzma for sublime-text 2 (python 2.6)
- corrected header bytes
- handling of files that are smaller than the headers

* backports.lzma for all windows version

* corrected key

* Update dependencies.json

* test

* Update dependencies.json

* remove period in name

reflecting https://github.com/dvhh/package_control_channel/commit/6989ebf39ac119f5e6d7de4b6e73ac57782a91bf

* update used module for lzma

* fix for joernhees#6
For  call  in  rather than

* cleanup

Compressor.py

@@ -228,7 +228,6 @@ class OpenCompressedFile3(sublime_plugin.EventListener):
     '''
     Sublime Text Event for the compressor plugin
     '''
-
     if hasattr(sublime_plugin.EventListener, 'on_load_async'):
         def on_load_async(self, view):
             '''
@@ -251,3 +250,8 @@ def on_close(self, view):
             remove(filepath)
             # Should be empty by now
             rmdir(dirname(filepath))
+
+
+if sublime.version() >= '3000':
+    def plugin_loaded():
+        load_modules(COMPRESSION_MODULES)