Lots of bugfixes and internal optimizations

• Update to hterm 1.84. Firefox fixes, openWindow security fixes, and few improvements.
• Update to libdot 1.26. openWindow & new codec helpers.
• Move c.googlers.com config into the relay.
• Allow bookmarks to open as windows.
• crosh: Exclude more files from the distribution.
• Switch to chrome.runtime.getBackgroundPage.
• Make relay connection resume an option.
• Switch to libdot.fs.FileReader.
• Switch to array buffers with ssh-fe@google.com.
• sshfe: Pass Uint8Array to stringToCodeUnitArray.
• Drop update available check.
• Switch to array buffers with corp-relay@google.com.
• sftp: convert to stringToCodeUnitArray.
• Switch to array buffers for sending /dev/random data.
• sftp: fix readChunks reading.
• Add more edge cases/tests for nassh-option parsing.
• Fix Chrome App v2 check on other platforms.
• Switch to array buffers for sending sftp packets.
• Update translations.
• Switch to array buffers for sending tty data.
• fsp: Use copy-data extension if available.
• fsp: Switch to client data sizes.
• sftp: Use larger read/write sizes with OpenSSH.
• sftp: Add some higher level read helpers.
• sftp: Add some constants for read/write data sizes.
• options: Provide readable pref strings.
• ssh_client: Allow JS->NaCl data to be sent via arrays.
• sftp: Rename {read,write}File to {read,write}Chunk.
• FAQ: Add a tip for OS shortcuts and launching windows.
• Add SSH-FE relay support.
• streams: Pass low level open errors back up.
• streams: Stop passing stream to onOpen callback.
• Add a --proxy-mode option.
• Split connectTo up a bit.
• Switch to new lib.codec module.
• tests: Switch to a dark theme.
• Automatically trim whitespace in connection settings.
• Document the current relay server protocol properly.
• Fix tab discarding to only affect current tab.
• ssh_client: depot_tools/webports: Punt.
• ssh_client: glibc-compat: Split out of webports.
• ssh_client: ldns: Fix cross-compile build.
• ssh_client: Switch from glibc-compat to ldns.
• ssh_client: ldns: Import version 1.7.0.
• GoogleRelayWS: Use DataView to get/set uint32 length.
• ssh_client: openssl: Enable libssl building.
• Unify duplicate base64url handling.
• Fix v2 & sftp after plugin API change.
• Drop forced compression.
• sftp: Add unittests for sftp packet types.
• ssh_client: Migrate from jsoncpp to native ppapi vars.
• Use new lib.f.openWindow helper.
• Rip option parsing out of nassh.GoogleRelay.
• Rename relay-options to nassh-options.
• sftp: Use UTF8 encoding for pathnames.