Fix parsing the short optional arguments (#357)

This patch fixes parsing of the optional argument to the short options
`-l` (for `--list`) and `-w` (for `--download`) to accept the target
file/directory on the iOS device. The functionality was already
implemented and working with the long version of the options. That is:

* `-l /Library` did not work and is fixed now;

* `--list=/Library` used to and continues to work;

* `--list /Library` did not and does not work (`getopt_long` doesn't
support that).

The fix is to remove double colons after these short options. A few
unused one-letter options were also removed.

Author: eunikolsky

README.md

@@ -77,9 +77,9 @@ If you are *not* using a node version manager like [nvm](https://github.com/crea
         -r, --uninstall              uninstall the app before install (do not use with -m; app cache and data are cleared) 
         -9, --uninstall_only         uninstall the app ONLY. Use only with -1 <bundle_id> 
         -1, --bundle_id <bundle id>  specify bundle id for list and upload
-        -l, --list                   list files
+        -l, --list[=<dir>]           list all app files or the specified directory
         -o, --upload <file>          upload file
-        -w, --download               download app tree
+        -w, --download[=<path>]      download app tree or the specified file/directory
         -2, --to <target pathname>   use together with up/download file/tree. specify target
         -D, --mkdir <dir>            make directory on device
         -R, --rm <path>              remove file or directory on device (directories must be empty)

src/ios-deploy/ios-deploy.m

@@ -1767,9 +1767,9 @@ void usage(const char* app) {
         @"  -r, --uninstall              uninstall the app before install (do not use with -m; app cache and data are cleared) \n"
         @"  -9, --uninstall_only         uninstall the app ONLY. Use only with -1 <bundle_id> \n"
         @"  -1, --bundle_id <bundle id>  specify bundle id for list and upload\n"
-        @"  -l, --list                   list files\n"
+        @"  -l, --list[=<dir>]           list all app files or the specified directory\n"
         @"  -o, --upload <file>          upload file\n"
-        @"  -w, --download               download app tree\n"
+        @"  -w, --download[=<path>]      download app tree or the specified file/directory\n"
         @"  -2, --to <target pathname>   use together with up/download file/tree. specify target\n"
         @"  -D, --mkdir <dir>            make directory on device\n"
         @"  -R, --rm <path>              remove file or directory on device (directories must be empty)\n"
@@ -1831,7 +1831,7 @@ int main(int argc, char *argv[]) {
     };
     int ch;
 
-    while ((ch = getopt_long(argc, argv, "VmcdvunNrILeWjD:R:i:b:a:s:t:g:x:p:1:2:o:l::w::9::B::", longopts, NULL)) != -1)
+    while ((ch = getopt_long(argc, argv, "VmcdvunrILeD:R:i:b:a:t:p:1:2:o:l:w:9BWjNs:", longopts, NULL)) != -1)
     {
         switch (ch) {
         case 'm':