minor module/source/variable name update
improved vim support: it now works with vim >= 7.0.0

 * handled absence of fnameescape();
  * some minor compromises in terms of "file name escaping" have been
     made in this initial "version 7.0 and later" support commit;
 * test reporting no longer needs 'float' support;
updated submodule url to use my own fork
updated submodule ('vundle') commit (moved to HEAD of [vim-7.0-compat])

 * this branch is now usable from vim version 7.0.0;
minor fix (used strlen() instead of len())
tests: made 'vundle' supported on vim-7.0.0;

 * test/vimrc_03_init_vundle-ex-local-pass.vim:
  * changed checking expression for access to the 'vundle' package;
  * relaxed requirements checking for test (just check the version);