Added help file, template .idrivewrc, updated show_help, added check for
external programs before usage and split out init from read_config_init

Added a help file and the show_help function has been updated to read
this file for both minimal help and detailed help

Added a .idrivewrc file as a template, this will be made available in
the /usr/share/doc/idrive-wrapper/ folder to help users

Fixed a bug where if the value for the IDRIVE_HOME_FOLDER in config
does not have a prefix '/' then upload/delete fails.

Separated the init for non config variables to a init_script function
and renamed read_config_init to read_config. read_config will only
deal with the confi file.

Included a check for getfacl and more programs in init_script and they
will be used only if available in system.
Added options for uploading and deleting from cmd line, show version and
specify IDrive Home folder for uploads on cmd line

Using -U and -D options files/folders can be uploaded by giving paths on
cmd line.

Using -P option the IDrive homd folder used for uploads can be given in
command line.

show_version function added to show idrive-wrapper and idevsutil
versions.

For file size interpreter added computation using 'bc' to get more
precision. WIll be used only if bc is present in system.

UPdated manual

Added GPL3 license file