travis.yml: Retry pip install
travis.yml: Retry pip install

JesseWeinstein/ArchiveBot,Frogging101/ArchiveBot,emijrp/ArchiveBot,Frogging101/ArchiveBot,falconkirtaran/ArchiveBot,Asparagirl/ArchiveBot,falconkirtaran/ArchiveBot,ArchiveTeam/ArchiveBot,ArchiveTeam/ArchiveBot,JesseWeinstein/ArchiveBot,Frogging101/ArchiveBot,JesseWeinstein/ArchiveBot,emijrp/ArchiveBot,Asparagirl/ArchiveBot,falconkirtaran/ArchiveBot,JesseWeinstein/ArchiveBot,Asparagirl/ArchiveBot,Asparagirl/ArchiveBot,emijrp/ArchiveBot,falconkirtaran/ArchiveBot,falconkirtaran/ArchiveBot,emijrp/ArchiveBot,Asparagirl/ArchiveBot,emijrp/ArchiveBot,Frogging101/ArchiveBot,Frogging101/ArchiveBot,ArchiveTeam/ArchiveBot,JesseWeinstein/ArchiveBot,ArchiveTeam/ArchiveBot,ArchiveTeam/ArchiveBot