v6.0.0-alpha.10 release of PowerShell

With 311 non-merge commits since v6.0.0-alpha.9, here are the major changes:

• Fix passing escaped double quoted spaces to native executables
• Add Dockerfiles to build each Linux distribution
• ~/.config/PowerShell capitalization bug fixed
• Fix crash on Windows 7
• Fix remote debugging on Windows client
• Fix multi-line input with redirected stdin
• Add PowerShell to /etc/shells on installation
• Fix Install-Module version comparison bug
• Spelling fixes

These are the SHA 256 hashes:

• powershell-6.0.0_alpha.10-1.el7.centos.x86_64.rpm
  • c2756cdeec2e178aa8f5149fad6c0a115fc1fbf8f04d95d3545b953a3016c34c
• powershell_6.0.0-alpha.10-1ubuntu1.14.04.1_amd64.deb
  • 41657975e0d16c3699eb0006794ed6ccfd891d0887b36a391df5f9d21a777f95
• powershell_6.0.0-alpha.10-1ubuntu1.16.04.1_amd64.deb
  • 5a884a3c03ca4c7309231431b663c44fbc9125665560cbeb0ba811e296569b33
• powershell-6.0.0-alpha.10.pkg
  • 01a2b1ea27b3ee03ebd92e10d5106f0a6df912e1d5586feeb4a8b57faba11c00
• PowerShell_6.0.0.10-alpha.10-win10-x64.msi
  • f669482aeab8de04f4da5ac03a36ce6b4e9f6569401b4cc842a4cd59196756a0
• powershell-6.0.0-alpha.10-win10-x64.zip
  • f394b51b6c8a865c0a1dd0c3645bb354e65339862ea95b60c9ff0226a307ded6
• PowerShell_6.0.0.10-alpha.10-win81-x64.msi
  • 74b570442072000d40ad945ea8dbe4eec7cef8b0ac9d31e1da0457352b26d03d
• powershell-6.0.0-alpha.10-win81-x64.zip
  • 2f4fd0b7a7a6447af724acdc0a42acec455e3ae916b7fed4895084faf71ae4aa
• v6.0.0-alpha.10.zip
  • 6a928f525613fcf394f2a80faef3569b8e49cdcd97ebede50175b229d2a0a6d0
• v6.0.0-alpha.10.tar.gz
  • 58b4c25333b8291b62b4d5a183725ab7a3ed6030c9f90a13a0c7acebe92b4fe7