tq1 0.3

Tq -- Command Line Scheduler
===

```
Usage: tq {COMMAND | -- TASK}

-> show usage, and tqd status
start -> start daemon
stop -> stop daemon
log -> dump daemon log to screen
ls -> fancy print of task queue
db -> print database content to screen
rm ID -> remove task with specified id, see ID with tq ls
clean -> remove log file, clean task queue
purge -> remove log file and sqlite3 db file
-- TASK -> assign TASK (a command line)
P R -- TASK -> create TASK with priority P and resource req R
int P range [INT_MIN, INT_MAX], higher = more important
P is used to tell important tasks
int R range [0, 10], estimated resource occupation
R is used for parallel execution

Tq functionality and feature:
1. run command one by one in serial
2. run command in parallel by setting resource parameter
3. task priority is supported

Example:
1. run two tasks in serial
tq -- sleep 10
tq -- sleep 10
2. run three tasks in parallel, each of then takes 40% of resource
tq 0 4 -- sleep 10
tq 0 4 -- sleep 10
tq 0 4 -- sleep 10
3. add a high priority task, which should run ASAP
tq 1 10 -- sleep 10
4. add a high priority task and run it right away
tq 1 0 -- sleep 10
5. add a task with even higher priority
tq 999 10 -- sleep 10

tq version: 0.2
```